That’s neat. Not sure it’s offered to me but I’ll look for the experiment. I like to double check software behaviors when I write comments like the one above, and I was lamenting behind the scenes that actually, I would like Shorts to have PiP. I didn’t used to want that, but PiP has grown on me.
Had to manually go to the App Store and update the apps so it took some doing even after opting in but I managed to get this working on my iPhone and iPad. It's only till March 5th though, but usually the more popular experiments end up becoming features later so hopefully they cement it in! Thanks!