Does DD need to see a doctor?

That doesn’t sound fussy to me at all!!!

Wow I would love my child to have your diet hes autistic and has a diet of beige food

Nuggets
Yorkshire puddings and gravy
Chicken fridge raiders
Burnt toast
Noodles

Sometimes a banana and some strawberries

He's healthy has blood test and weight checks often.

Apparently I grew up on marmite Sarnies wouldn't eat nothing else lol I'm now a big foodie xx

Yep!
There was a very moving documentary about a young woman who died from anorexia. They interviewed her mum and asked what advice she’d give to parents. She said “never make food an issue”. Your MIL is trying to make food an issue. This would start your DD thinking that food is some problem thing.
You’re doing the right thing. DD is eating healthy food in enough quantities to keep her healthy. You’re not trying to force her to eat things she doesn’t want, or making her think she’s abnormal. Most likely her tastes will broaden as she gets older - this is what happens with most kids.

I doubt taking her to the GP would achieve anything.
It would probably be evident to you if she had sensory issues around food.
And the GP will probably be pleased that your daughter is eating from all the different food groups.
I had a friend growing up who would only eat cheese sandwiches. Had to be a specific brand of bread and cheese. Doctor said he's healthy, no issues, nothing for them to do. Don't know if he grew up to eat better but there was no intervention deemed necessary from a medical perspective.
A cousin eats only fish paste on bread and chips. Basically the same conversation with a doctor, try to encourage veg etc but nothing that a GP can do/offer/suggest.
A friend of a friend eats only bread, literally only bread and is a fully functioning adult, owns a house, has a job, married, has a dog and a kid. Perfectly healthy and happy. Takes a vitamin & supplements, which the GP might recommend if your daughters diet was this limited.

What exactly does she expect the Dr to do??

And despite no meat eaten by mine his iron levels were actually fine but if you are worried the tasteless spatone iron supplements are great

I have a very fussy eater who eats a lot less than that and his nutritional bloods were all fine showing he got sufficient nutrients off way less options. And your DD will try new things whereas my DS is clearly really anxious about different foods. So I don't really think there is anything to worry about or that the doctor would do and any advice would just be to continue what you are doing in terms of cycling round the things she will eat and introducing new foods without any pressure

That all sounds good - the one thing to be aware of is a potential lack of iron - my DD would eat veggies but not meat when younger and became anaemic for a bit, which made her tired and irritable. Was dealt with easily via supplements.

Well firstly having had a "fussy eater" (actually ARFID) that list sounds pretty good.
Secondly what exactly does your MIL think a Doctor is going to do about an 8 year old who is a healthy weight and height who eats a reasonably balanced diet?

Sounds a bit as though your MIL wants her to have an eating disorder.

It doesn't matter if she eats the same things on repeat or eats a wide range, as long as she gets a range of nutrition. She seems to eat enough to get a balance of protein, fat, fibre and vitamins, so no issues. Historically, we would have had a much smaller range of foods and hardly any spices in a UK diet. One of mine is pescatarian by choice. Never really ate much meat from weaning and refused all together from around 5. I think he just doesn't like the taste/texture.

My gorgeous DN will only eat processed cheese slices from one specific shop, white bread of one specific brand, Birds Eye potato waffles, Aldi chocolate spread and will only drink double strength orange cordial from Aldi or green milk. That's It, The entire diet. Once in a blue moon we will be shocked that wet have got them to try something simple like say... rice crispies and they are briefly accepted but at the cost of another food being dropped. We have never ever got him to eat more than 5-6 food items and even "treats" like chocolate etc is treated with the very highest suspicion.

That is a restricted diet.

The doctor won't care.

You have a MIL problem

Looks absolutely fine to me. I have older teens who have gone through phases for their entire childhoods of eating anything and everything to almost nothing. Eldest at 19 will try anything and eats most things. I’m still waiting for the 17 year old to come out of the fussy, I want a takeaway phase!

And echoing other posters, please don’t talk about your DDs diet in front of her or she will end up with disordered eating.

They all eat everything when first weaned. When I compare the diet my 6yo has now with the diet she had at 1! But all very normal.

I agree the biggest danger here is that your DD overhears your MIL and that causes issues with food. Her diet is fine. No MN patented incredible but fine.

At 8yo personally I wouldn't let a child make the decision about becoming a vegetarian especially if they are already fussy. My dd wanted to become a vegetarian at 10yo and we negotiated that she would still eat fish but not meat.

It's really hard to get enough protein into fussy kids if they don't eat meat. My dd went onto develop an ED and I've since learnt that becoming a vegetarian in pre teens can increase the risk of developing EDs in some kids.

You have a normal 8 year old and an interfering MIL.

You have an interfering MIL issue here, not a child with an eating disorder.

As we grow our tastes change, what may taste fantastic to adults can taste absolutely fucking vile to children - as long as shes got the opportunity to try/explore new foods in a normal, natural (casual) way I really wouldn't worry.

What will absolutely fuck things up is someone interfering, insisting she try, refusing to let her have foods she knows are safe/tasty and generally commenting on anything she eats/does not eat.

Agree 100%.

I don't think your DD's eating habits are the problem here - maybe your MIL needs to visit the GP to get her interferingitis checked......

How is a visit to a doctor going to change your daughter's eating habits. Be careful that your (and MiL's) anxieties about food don't lead to disordered eating.

Sounds completely fine