I would actually love if I could have iOS prompt me to allow certain apps to use the speakers. I hate using an app and suddenly have a video autoplay loudly.
Inside iOS accessibility settings you can turn off “auto-play video previews.” This blocks perhaps 20% of video autoplay; it’s still better than nothing.
Philosophically I hate silent video autoplays just as much as I hate autoplays with audio. One distracts your visual attention, the other distracts your aural attention, and I don’t quite understand why society has normalized silent video autoplay.
I wish Android had this as well. There are apps where it's difficult-to-impossible to turn all sound off, and I wish I could just tell my phone that this app is just never allowed to use the speakers.