Shouldn't it be accounts in the same instance? Else, I'd propose myself. I have been moderating other low-effort communities (on my account's instance)
I think you could still be a mod, even if the reports don't federate (I think I only got a few when the community started). It's mostly to have someone else in case I go away for some time.
Would you be okay?
(As a side note, are you European? Not critical, but just curious)