Again, not one is forcing or padlocking or having any child screaming around here. I refer you to my previous response.
My youngest nephew was a wriggling explorer (among other things) himself. He soon learned that if you don't sit, you don't eat. You can explore while everyone else eats, and when you're good and hungry, you can sit and eat too.
No-one was spending dinner time following him around at his house, my parents' house or mine. By the time he got to a restaurant he knew to sit down and eat/draw/sleep or chat.
I understand that seems fantastical to you, but for me it really isn't anything special. My daughter's first time in a decent restaurant was at 6 months old for a celebration. Not a scream or fidget. We went out regularly and they behaved.
They were not unicorn babies. Just well behaved ones who practised what they were accustomed to 🤷🏾♀️. It is highly likely when you're not being ridiculous, you see many of the same children behaving well all around you.
My daughter's first screaming event was at 2 years old - the first time she had to sit in her own seat on a flight. Take out scared the shit out of her and she screamed. The lovely cabin crew came over when the seatbelt signs went off and played a light on/seat belt on, light off/seat belt off game with her and that was it! She was quiet for landing. That was that. Most children do not go around screaming just because they can't have their own way.
If anything, I’d be impressed they were making the effort to do that rather than just sticking the child in-front of a screen.
This also doesn't impress me, because children have been sitting well at tables long before screens.