Just tapped on a BandCamp link in a text message (1), and a popup offered to open it in PipePipe, either in the main app or a background player. I chose background player and it's working fine. This is awesome.
In theory this capability has been available for a while in @newpipe (of which PP is a fork), but I don't remember ever getting it to work.
(1) using Fossify Messages on an Android, via F-Droid