Is there a way to assign a tag to a Uproperty?

I still don’t understand what your use case is.
What are the numbers needed for?
Where does the data come from in the first place, and what do those data represent?
It feels a lot like you’re trying to solve some particular problem with some particular approach where it’s very likely a better solution already exists using some other approach, but recommending where to look is impossible if I don’t know what you’re actually trying to accomplish.