For one of our Samsung TVs, we were able to put the update on a thumb drive (we're old, we still have some around) and then use that to install the update on the TV.

It's kind of funny, we bought these TVs because they were "smart" (when they first came out) but they were so clunky and unreliable we disconnected them and used either PS or Apple TV for other things. Now we wouldn't connect our TVs to the internet for anything, and only use PS5s for specific things. We mostly just use our Apple TV.