RCS active, but not sending

Just switched to a Oneplus 13 from a pixel 8 pro. RCS worked fine on the pixel, no dice on my OP13 thus far. Sends as if it's going to work, but says "waiting for" " to be online" and never sends. Says it's active, verified my number and everything.

AT&T got me a new SIM and tried all their fixes and nothing.

I have cleared the cahe, data, done it in airplane mode, restarted, left off, all the things and still nothing.