How to Migrate Animated Characters

I have several animated characters in an older project file (4.16.3) used for testing. Rather than recreate them I’d like to migrate them from 4.16.3 to 4.18.3. I tired to do this as I would any other mesh but have had no success. I’ve tried to search for how to do this but have come up empty. It’s likely that the terminology I used to search with is off and skewing the results.

Could someone tell me how to migrate or move the entirely of these animated characters or link me to a detail how-to process?

Thank you in advance.

Yeah, I have the same issue and the generated .uasset files don’t seem to be recognized.