I just purchased the Realme Master Edition GT (RMX3363). It supports VoLTE, wifi calling, and all Tmo (and legacy Sprint) bands except 71.
Is there any way to petition for VoLTE and wifi calling support to be recognized on phones like this? The Tmobile BYOD checker says this phone doesn’t have VoLTE, but it does. I’ve used other off brand phones (currently using one, but not going to call out the make/model here, just in case Tmo goes out of their way to block/ban such phones) from other parts of the world on Tmobile with no problem on VoLTE and wifi calling support.