Best answer by AjTrek1
In any case I suggest you make sure you are using the latest Sonos App v9.1 If you are already using v9.1 then remove the Playbar from the room (as well as surrounds and sub) and add everything back as a new setup starting with the Playbar. Go thru the steps to program a remote.
If none of the above works...call the TCL support team (picture) an explain your situation. Do not attempt a factory reset unless you are told to do so by contacting Sonos Tech Support after you submit a diagnostic and post the Reference ID in this forum. Good Luck!