I have paired my Playbar (with extensions to 5.1 sound system) with the LG OLED TV. Works well so far.
However, the set-up was a bit tedious and only worked after I had reconfigured the TV from location CH to location DE. Only then was it possible to set the Magic Remote so that it also sends IR signals and can thus control the Sonos Playbar.

Here is the link to the Sonos homepage, but as I said, the solution described only works if the LG OLED TV is not configured with location CH, but only after changing to DE.
https://sonos-de.custhelp.com/app...