I have autism/am autistic (don't care about terminology but whichever I choose will lead to a 5 page detour over terminology so I'll use both) - I have as my reasonable adjustments negotiated with my employer that I apologise in advance but I'm a doodler, a quiet fiddle toy-er and similar in meetings, but that without it - I'm so busy running my mental "do I look sufficiently attentive" script (to please arseholes like some on here) that I won't take in any of the content of the meeting. Prior to negotiating all of that I was a terrible pen clicker and most of the meeting would be me trying to stop myself doing it, doing it once, feeling satisfied then self-loathing about annoying people, then I'd end up dismantling the pen, rebuilding it and eventually losing the little springy thing and trying to round it up off the floor with my feet... I didn't take in much of the meetings but came out of them feeling like shite!
Likewise I have negotiated that on Teams I can tend to focus better with camera off and I might be doodling or crocheting there - I pop my camera on for the hello and goodbye bits of the meeting but if I'm not involved in the discussion actively and it's one of those meetings where it's more imparting information than discussing (translation: meeting that should be a fucking email) - I can't take the content in if I'm worrying continuously about masking and how I appear.
The change those adjustments have given me in my work life is absolutely fucking amazing - it's reduced the levels of social burnout I experienced previously where I'd be needing a darkened room after about 6pm at night to recover and remain functional to a level where I actually can HAVE a work-life balance.
Thankfully I work with colleagues who are very understanding about neurodiversity to the point that one puts a bowl of fiddle toys out when delivering training alongside the biscuits to keep people focused and we work with a client group who usually have collections of stims, sensory aids and quirks!
I have a selection of fiddle toys I love and use freely, and then I have some that I use in meetings and the like which are silent and you probably wouldn't even notice my hand turning an infinity cube through its phases under the table... well unless you're a MN faux-horrified one who will be revolted at smelling day old towels from 3 miles away, that someone doesn't get 2 months out of one chicken, and having your ears scraped out by knitting needles.