We were (I was) going to hint to them if our friends weren't on the list - even just to go to the evening event.
But we've decided not to say a word.
As some pp have pointed out - there will be plenty enough people there - and getting to talk to everyone will be improbable. My husband knows quite a few of future son in law's friends and also their fathers. A large group of them regularly go to a few major football matches together. They always come home worse for wear after their long weekends. Son in law plays football for a local league and also coaches a couple of young teams on an evening. This is where his many friends come from. I know there are certain friends of his whose parents he would like to attend. I know my daughter's friends well (mainly from school) and also their partners - I will be able to spend time with them on the day. It will also be nice to get to know the in laws wider family. Perhaps if our friends attended they would feel lost in a sea of people they don't know and feel bored/uncomfortable.
My husband and I have both 'enjoyed' (?) going through this thread. We're a little upset that our daughter is now classed as a money grabbing ingrate. But I have put her in that position - whatever. She certainly is quiet and reserved - her partner is the opposite. They went through hell when their first daughter was born at the beginning of lockdown. She needed immediate surgery and was in NICU for six weeks. Her partner did not meet his daughter for six weeks. It was touch and go on at least two occasions that their daughter pulled through due to complications. Their baby came home on oxygen. Stupidly, we followed lockdown rules to the letter and just delivered their weekly shop for them. That was until my daughter's GP kindly suggested that I go and stay with them and give them some support (my daughter was really struggling). And again, our daughter gave birth to twins last year, the second twin had not arrived more than an hour after the first and she had to give birth immediately to a breech baby or have an emergency caesarean. Her baby was born bottom first, floppy and unresponsive - the scariest moments they had ever faced. It was only a matter of minutes before the second twin was resuscitated but to them it felt like forever. They've been through a lot to have their children. They are wonderful, attentive parents. They share every task equally. It's more than evident they respect and adore each other. Future son in law said that it was the admiration he had for our daughter after that traumatic birth that triggered the proposal. He was in absolute awe of her.
We're delighted to be able to pay for their nuptials. They didn't ask for money - but I'm sure they knew we would contribute.
We enjoy our daughter's and future son in law's company and that of their family. As a pp said - it's not his fault he has a massive family and has masses of friends. He just does. My husband has had a new lease of life/experiences since he started to be included/invited to these football matches.
I was triggered by a thread where someone was shocked at not being invited to their friend's' daughter's wedding. It got me wondering if our friends would be 'entitled' to be present at our daughter's wedding. They aren't.
Having seen the judgement and reaction - we know that 'no strings' means no cheeky hints.
I can see that it looks like the groom's side have an advantage, we have said that ourselves - if it looks like that, so be it. My husband has said more than a few times that it's the in laws wedding he's paying for because on balance that's exactly what it is. We can accept that. I'm not scared of my daughter. I just don't want to insult her judgement by rearranging her arrangements.
But I will be miffed if any of the future in laws' friends make the cut. 
So sorry for that epic - you don't have to read. It's boring in the scheme of things.
I don't suit pink - I'm not a pink person.
I'm dreading trying on my own outfit - I hate my face.