I haven't played it myself, but there is a mod for playing FO1 in the FO2 engine.

Based on reviews, it seems to be well made and highly regarded.

Although it sounds like this might not be what you are looking for.

Fallout 4 New Vegas teucks along, but slowly af :( Cannot blame them tho. They do however "leak" parts of their work back to community, like proper sheath system like in F:NV

Could someone save me some digging and let me know how they’re progressing?

If you just want an off-the-top-of-my-head response, the only "remake" I can think of that has been completed is the Tale of Two Wastelands mod for Fallout: New Vegas, which merges Fallout 3's content into Fallout: New Vegas, lets you play a single character through both. You'll need to own both games to do the install (and I imagine that any project that incorporates the data would have this requirement, to avoid copyright infringement). IIRC, there are minor content modifications to make the two fit, but it's not aimed at doing something like "Fallout X with 2025-level assets".

There are engine reimplementations for the isometric games, but those aren't aimed at remaking the content so much as they are running the original data on an open-source codebase; I assume that that's not what you're after.