Unless you are running a rooted phone in which case Google says to go fuck yourself. If your phone doesn't pass Play Integrity they will not allow RCS to work (among other things) but they don't even indicate that to the user. It just silently doesn't work.
Play Integrity Fix is a mod that addresses this, but recently Google has been fighting back and breaking the way the mod works every other month. Their last salvo was middle of last week and last I checked the XDA thread a solution had not been found yet.