Ok, I'm going to ask even though I know l'll probably regret it: How do you manage a trip to WDW without standing in any line? Even with a
DAS pass you have to stand in a line. Unless you are on a MAW trip there are lines.
I'm not arguing that all autistic kids can handle lines. But there are places to wait without being in line or at a table.
I'll answer this since my son is on the spectrum, but I am sure it is different for everyone.
He can handle lines in certain situations, but other situations are much more difficult. A fastpass return where he knows he will wait 10-15 minutes and you're moving quickly in a queue with stuff to look at and experience is ok. Usually they are pretty wide (unlike QS queues) and he can lean on me for sensory support as we go through the queue. Pooh was great with the actual sensory stuff for kids to touch but he can also sooth himself touching the textures on the walls and reading signs and other theming elements in a ride queue if it's not moving at the moment.
Character lines are very very difficult for him and we don't really do them except under extraordinary circumstances... like Nick Wilde and Judy Hops at the Christmas party, and it was a dicey 35 minutes. He did great... for him... but I know my little guy put everything he had into controlling himself, his body, his sensory discomfort being in that queue for that long. But we were at the MK one night when it was super crowded (late night between christmas parties) and he nearly melted down after 35 minutes in the Peter Pan FP+ queue because it was long, confined (he couldn't move around) and unexpected... he has an expectation about how long FP+ lines generally take and can handle it for that time. I do a lot of character meals with him because lines for the characters are so hard for him. I'd rather he use his energy keeping it together in a 15 minute FP+ queue than a 30 minute line to meet a character.
QS lines are crowded, confined, sensory overload, without any idea how long it is going to take (my son also has anxiety, as most kids on the spectrum do). There is nowhere for him to move, people are practically up his butt while he is waiting, the smell of food makes him realize he is hungry and there is no way to tell him how long it is going to be. It's a very difficult situation for him that I am hoping mobile ordering will alleviate and we will do a couple of QS meals on our trip. Generally I only do TS with him because he can spin to work off some of his anxiety/energy outside the restaurant if it is taking longer to get seated than expected, I can get beverages and bread pretty quickly while we wait to be served (or serve ourselves at a buffet) and he's most of all not confined in a small and crowded place while waiting. He will often get up when he is done eating and come put his arms around me and stand next to me while I finish because he needs the sensory input, and there is often room to do this at a TS restaurant without being in anyone's way. I prefer it if we can sit side by side rather than across because then he can just stay in his seat and lean with my arm around him but that necessitates a 4-top table or seating like at sci fi.
Every kid is different but that's mine. He also has how much he can handle for the day so I'd prefer he use his energy to keep himself composed in ride queues than in food queues, and make the meals relaxing breaks from everything else. I travel solo with him so I don't have the option to sit him down with someone else while I go and get the food but if I did I'd happily let him sit, decompress with some electronic thing and chill out rather than be herded in with the cattle in the QS lines where his senses are assaulted by all kinds of difficult to handle sensory inputs.
That said as a single mom the flip side is that because I have no one to hold a table for me, I am always the one juggling tray, food, beverages and child looking for a table that will be invariably dirty when I finally get one. Also I don't particularly care to sit with strangers as when I am having a meal I am decompressing myself from the overstimulation that is Disney and I am generally not in the mood to put the emotional effort into talking to strangers. So I basically have avoided QS like the plague, but we have a couple planned at off peak times who also have mobile ordering and I hope it will go better. But I'm sure I'll end up being sorry
But we want to try Satul'i Canteen! We have done Biergarten as well and enjoyed our tablemates but that was a choice I made at that point to be social. I'd not be really happy if someone asked to sit with us but I would not refuse them. That said I have a pretty good resting witch face that seems to keep people away