I REALLY feel your pain - my son is just like this. I have an older DC and this was a non issue with her - ate 3 meals a day, 2 snacks then got down to play etc. I thought I was a genius - I didn’t realise it was just how she was!!
The new one (now 4) just finds eating boring (his words) BUT he has to consume vast quantities of food to sleep at night, so it’s a bloody nightmare. Ideally he would just graze on a 24 hour cycle like a baby (and he did when he was!!)
I have no good solution to offer you as I have resorted to screen time at the dinner table in order to keep him still and eating. When he was smaller I read books while he ate, but I just don’t have time/energy for that right now! I don’t let him eat while roaming, mainly because of the choke hazard and mess.
So dinnertime is TV time (other meals I just sit with him and help him when he flags a bit. Pudding can be a good motivator, or whatever it is we are doing later that day). I also do dinner x2 ie. dinner, break for playing/bath etc, and then a “snack” which is almost as big as dinner! Porridge is helpful at this stage in the evening…
Mine is also not fussed about sleeping, so will stay up late - which is just as well given how long it takes to fill his tummy. But it means I almost never have an evening as am dealing with him until late at night.
Honestly it makes me despair as I feel my whole night revolves around feeding him. But if I leave it to him then he’s hungry at bedtime and won’t fall asleep til he has eaten something and then ALSO wakes up hungry in the night.
All I have to offer you is that a snack at the 5am wake up (or any other time) usually results in at least another 2hours’ sleep in our house. Bananas are your friend! Warm milk is good after dinner. Also just maximize daytime calories as much as you can. But it doesn’t help much…
The issue isn’t he won’t sit at the table - the issue is he has better things to do than eat, right up until the point where it’s bedtime at which point eating becomes the preferable alternative. It is M.A.D.D.E.N.I.N.G
I’m so sorry - I feel ya!