On my side the T300 works perfectly with the PS5 (tested on GT Sport / Project Cars 3 / Assetto Corsa Competizione & F1 2020). Don't forget to put the switch of the base on PS4 position (before plugging the USB) and to connect the wheel to your profil with the PS button of the wheel.Hey. My T300RS is not working on PS5. Is there an update that is supposed to come out for it to work?
Important Reminder: Currently the PlayStation 5 versions of WRC 9 & DiRT 5 don't support any steering wheels (they will add this support soon with an update of the game).