This app was mentioned in 2 comments, with an average of 1.50 upvotes
I don't watch on mobile often because it's such a pain in the ass with the location spoofing. But I have successfully used this app:
https://play.google.com/store/apps/details?id=org.ajeje.fakelocation&hl=en
And I used this app to make it a system app:
https://play.google.com/store/apps/details?id=de.j4velin.systemappmover&hl=en
They will only check your GPS location when you first start the stream, so you can spoof for a few minutes and then disable the spoofing once the stream starts.
This is beyond my area of expertise, but you could try something like Location Spoofer and see if that works. (Read the configuration instructions).
If it does location via GPS, then I think that'll work. If it pulls location via tower triangulation, then you are probably screwed.