These work for at least the 7 series, there were no more ads in the menu’s.

I can share the pihole domains I have for my samsung tv (although it’s no longer connected to the internet now)

• ocfconnect-shard-eu[0-9]{2}-euwest1.samsungiotcloud.com (regex deny)
• ads.samsungads.com (exact deny)
• samsungacr.com (exact deny)
• samsungotn.net (exact deny)
• log-config.samsungacr.com (exact deny)
• gpm.samsungqbe.com (exact deny)
• config.samsungads.com (exact deny)

It stopped any ads coming through and also prevent (some) data going back to them, mind you this also breaks installing new apps on the tv, so disable, install app from their store, enable again.

Hope this helps