connect rf remot

Soundbar 1st gen doesn’t tell us anything. Do you mean the PLAYBAR, the PLAYBASE, the Beam, the Beam gen 2, the Ray,  the Arc, or the Arc Ultra?

Have you contacted Sonos Support to discuss it?

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

Your account information suggests a PLAYBAR. TCL seems to pop up frequently as having issues. I’d be tempted to first reboot the TV itself, by unplugging it from the wall for two minutes, then plugging it back in. Once that’s done, I’d suggest checking the TV for updates from TCL, and then flipping the remote settings from RF to IR, which the PLAYBAR needs to function. Once that’s done, open the Sonos controller, and run through the setup option for TVs, which should make the PLAYBAR recognize the IR based remote. It won’t ever recognize an RF remote, it doesn’t have the capabilities.

As a note, there was only one generation of most of the Sonos soundbars, with the exception of the Beam, which has two.