It is a really niche feature, I doubt it would get a lot of votes unfortunately.
I don’t know of any fridge or oven from any company that gives the option for sabbath mode to happen automatically but that would awesome if it did. They don’t even let it be automated in their apps, unfortunately.
Really, setting it for every Friday evening on a timer and off after Saturday would make a world of a difference (although at times we would need it during the week for holidays, but that’s occasional and not as often).
My GE Profile in wall oven has sabbath mode. I can schedule it on the oven itself. The GE Home custom integration exposes the mode as just a switch in HA so I could create an automation in HA to control it as well. As for LG ThinQ, someone would need to dig into the API and see if it is available as more than just a status. The ThinQ integration that I use lives here: GitHub - ollo69/ha-smartthinq-sensors: HomeAssistant custom integration for SmartThinQ LG devices