*.samsungcloudsolution.com
*.samsungosp.com
*.samsungqbe.com
*.samsungcloud.tv
*.samsungads.com
The first one gets the most hits.
I also don't connect my Samsung displays to Wifi anymore. Unless I notice a problem that I have to search to fix. Then if there's a firmware update that fixes the issues, I'll do it.
NextDNS and ControlD are helpful for blocking this sort if thing, or Pi-Hole if you want to set it up yourself.