Oh my gosh, I was just experiencing the PWA rotating thing and it was driving me nuts trying to figure out how to stop it. Nothing else on my Android auto-rotates, and I didn’t immediately see any settings that could stop it. It seems like all PWAs created from Chromium (Vanadium to me) do this on my phone. I created the PWA from my Firefox app (Ironfox to me) and it seems to work fine, though it uses my installed Firefox extensions on the PWA - notably I have uBlock Origin set to block images above 50kB until I click them, which I have mixed feelings about using in conjunction with PieFed.