Have you attempted the Remote Control Setup under the Playbase room settings?

Yes. Playbase doesn’t recognise Samsung remote 

You have tried the instructions here? My guess is, as the PLAYBASE requires IR, your remote is not currently emitting it, since it is a ‘smart’ TV. 

Hi - yes I have tried this. The new TV is a 2022 model. I don’t believe the remote is a Samsung one as it looks different. Also the steps in the link you suggested don’t match what I have on my TV ie I can’t follow the steps because it must be different on 2022 model

You may need to speak to Samsung Support to see if there is a way for their ‘remote’ to universally control infrared connected TV devices. They may be able to talk you through the steps required. If not then you can use any separate IR ‘remote’ to control the volume - which is perhaps easier than having to always open the mobile Sonos App. In some cases, users use their connected cable TV remote instead, but it depends on what’s available with the TV setup you have.

I got it to work. Thanks for your help

How? Just in case anyone else encounters the issue with the same TV, it would be helpful to refer them back to this thread.. thanks