How can I find all the columns available in UniProt.ws package for R?
Do you have a small sample of the proteins you are looking for and what you have tried so far in R using Uniprot.ws ? (including output of it), it could be helpful to identify your problem and how to solve it.

Personally, I would rather consider Bioconductor as a platform for providing R packages dedicated to bioinformatics than a package to analyze data (but it's my opinion, maybe I'm wrong).