I think whether you BLW or not when babies (I am only speaking of NT here as SN often have food sensitivities) become toddlers they develop their own sense of control and also get notoriously funny with some foods and some textures, such as sauces.
As any family of two or more will demonstrate, some children are brought up in the same environment, but are demonstrably more or less fussy than their siblings, and do grow out of it. Please don?t blame yourself.
As anyone with a very fussy child will tell you, this is a battle of wills you won?t win and you just have to ride it out, but at the margins these things may help. I?ll add that I lived in Asia (live in Russia now) and it does seem that children were/are less fussy than in the west, this may be down to different cultural practices and more eating together as a family ? I don?t know.
You could try this. It may help a bit.
If you can, eat as many meals together as a family. Don?t cook kid?s meals. Eat the same food. (ie if partner doesn?t come in til later every night cook what you?d cook for a family and keep it warm for him)
Make no comment about the food when serving it. Oh, and don?t serve too much (I always do and keep reminding myself that they often only eat small portions). Sometimes a large wodge can overwhelm a kid.
Don?t encourage, mention, lift up gobbets to the mouth, praise, admonish. Nothing. Only mention the food in passing, as you would naturally. Don?t watch, sneak glances.
If they get down, let them. (Mine infuriates me doing this but I let her and she always comes back. I just refuse to have ?words? at dinner time. It?s our nice time) No telly, loud radio, just maybe some nice music.
If nothing is eaten, clear it away and say nothing. You could offer fruit, but don?t offer alternative meals, like bread or starchy stuff. They will not wither away by not eating that much for dinner.
Don?t worry if they don?t eat much in a few days (I know it?s hard, I have a 9th centiler myself). Of course, if you do this over the course of a week and they are starving themselves, then pause for reflection.
Engage them in food. Ask them through the day what they like and then cook it together.
Limit snacks to less filling fruit (I?m trying to do this more, mine is a biscuit mad thing) so they are hungrier at meal times.
I?m not saying my set up is perfect, and my BLW child is definitely entering a phase where she plays up more at dinner and refuses some things. And she?s a demon for snacks (gets round my husband like a dream and he looks after her for half the week) which I?m trying to work on. But we eat every meal together (we are lucky) as a family, she eats what we eat (within reason, I hold back the sezchuan peppercorns and birds eye chillies until I?ve served her portion) or else she doesn?t eat. I?m not a hard-hearted old cow, serving searing hot curries and sezchuan food every night and do think/ask what she?d like and we have that (lots of vietnamese as she likes the sweetness and roasts) But we?ve always eaten nice meals together and hope that will continue. I am preparing to eat my words though.
Good luck