… presumably it would ‘break’ basically all of them, given that this is a remaster, aka, a different game, the same way that the GTA Definitive editions are remasters of the original games.

The Creation Engine is now … what, 15 years older?

And if they do what they did with the Oblivion remaster, it’ll be a frankenstein of UE5 and the Creation Engine.

So yeah, you’d have to make all the mods all over again, perhaps with a few very rare exceptions…

But it wouldn’t break the original FONV.

… Unless they just just decide to do that, like they did with FO4.