Some music in my SoundCloud android app isn't availaible in my country. How do I get around this using Orbot? I tried switching on Apps VPN mode and selecting SoundCloud, (set location as US first, then UK) but that didn't work. My phone isn't rooted.
Because tor-exit-nodes are popular by many websites on the web, (as mentioned before) they are blacklisted.
This happened because there are so little volunteers to become the exit nodes that it is a miracle that someone can access the internet without getting blocked (and I mean clear web / clearnet).
A possible solution to your problem with location would be to get a good VPN service with many servers and locations so that you can access SoundCloud without getting blocked by it.
Tor exit nodes are often detected by web services, so if you insist on using Tor for this, you'll have to try (New Identity button at top right corner) lots of exit nodes until you find one not in their lists.