PTT on the web is quite awkward because of the browser limitation of capturing keys when not in focus, but I can experiment something for when it’s the focused window.
This is something Discord did very recently automatically, and I kinda like it. It alerts when someone who you expend time talking goes to a room you expend time on from what I gathered.
I have barely used PTT on mobile, you would need a full overlay or something and a touch target that takes half the screen right? Also locking rotation. Lots of work there.
That is little nice idea!
To be honest, there are a few things I’d like to expand before considering mobile UX, but these are great feedback.