Here’s the thing, there really isn’t anything for companies like Republic to support. Google has made Google Messages work around the carriers, like iMessage, for RCS. When RCS is enabled messages bypass Republic entirely, not using their systems. As far as Republic is concerned these messages are a data packet like any other.
So, that creates a number of issues in that Republic has no way to troubleshoot. When messages don’t show up, they never touched Republic and so Republic has no way to figure out what’s going on. RCS also requires data so people that have RCS and are on the talk/text plan don’t get and can’t send RCS when away from wifi and then complain to Republic about not getting messages until they return home.
Bottom line, Republic tells people to turn it off because it is impossible to troubleshoot and isn’t part of your Republic service, but customers think of it as “texting” and think the cell phone company can help with issues. It’s a no-win situation for Republic (or frankly any phone company).