I found 3 exmo communities by using https://browse.feddit.de/. They are:
To find the exmo community on one of the instances your account isn't from, put "!exmormon@{instance's domain name}" in your instance's search field.
For example, my lemmy.world account can find the other 2 communities by searching "!exmormon@lemm.ee" and "!exmormon@lemmy.ml".
You could also use one of these convenient links:
Hopefully some heathens out there will find this helpful. Welcome to the Fediverse! ~(~~.~~.~~.~~s~~a~~y~~s~ ~a~ ~g~~u~~y~ ~t~~h~~a~~t~ ~g~~o~~t~ ~h~~e~~r~~e~ ~4~ ~d~~a~~y~~s~ ~a~~g~~o~~)~
!links:
!exmormon@lemm.ee
!exmormon@lemmy.ml
!exmormon@lemmy.world