I purchased through GOG and when I look using file explorer in Windows 11 I don't see patch 4.1.1.3911062 listed
That's because with Patch 4 they changed the way they did things. Previously the patch and hotfix files would appear in the game bin folder (they were effectively overrides). With P4 the old patches and hotfixes were removed and everything was incorporated into a patch which directly overrwrote game files. Among other things it means the patches and hotfixes wont eat up so much of your drive space.
You might want to consider stopping GOG doing automatic updates to remove the risk of Larian breaking your game.
