Hi Chantelle,
I ran into this issue too, and it's not currently possible AFAIK. The uc file is deleted automatically after clustering. I previously was able to avoid it being deleted by hacking the qiime2 file, but this doesn't seem to work any more (although you can try the workaround, see here: When clustering ASVs from deblur with VSEARCH, is it possible to know the membership of resulting clusters? - #7 by colinbrislawn).
I do want to fix this though (see here: Guidance modifying q2-vsearch to recover UC file) but have not yet gotten around to it yet and am not sure even if my coding knowledge is sufficient to do so... So that's where it stands right now to the best of my knowledge. I will try to take a look this coming week though to see if it's something I could even handle and get back to you!
Jesse