Thanks!
lxc-destroy -n default --lxcpath=/tmp/appsupport deleted it. [Stop App Support & uninstall it first]
Aurora lost its settings? But newly-installed Revolut is still complaining about root, sadly, though I’m not surprised it wasn’t corrupted, being read-only.
So Revolut is perhaps picking up on some Android app installation. Next step, deleting .android and android-storage.
Not sure if this is helpful but a Reddit user is claiming Revolut is using DexProtector/Licelus. There’s a video for removing it from a decompiled APK but I think that’s one of my last options.