Welcome @monsieurbj, I post some information earlier in the discussion here that talks about coffee and neuropathy — https://connect.mayoclinic.org/comment/696322/

For my neuropathy, coffee hasn't made a difference either way but then I only have numbness. It does seem to help with other aches and pains or maybe it just makes it where I don't notice it as much.

Your idea might be a good test if you don't mind going caffeine free for a week or two.