Isn’t it available? This is a screenshot from Plex on my iPhone w/ the new player.
The only complaint from other users I’m aware of is that there’s a minor stutter when you shift to PiP. This is because PiP uses Apple’s native player (given it’s an iOS feature) – so if the video cannot be direct played using Apple’s native player (while the new player does), your server will need to switch to transcoding the video which can give this visible one-time stutter.
I was simply swiping up and noticed the video would close out.
I noticed on my end, the video would just pause and I had to click on Play to resume. It didn’t continue on its own. small problem, but not a deal breaker.