@MojangSupport can't join a friend at all, and vice versa, playing on the switch version.
3
Replying to @Crunkulous
Try these troubleshooting steps: help.mojang.com/customer/por… (for Realms, but should work here too). ^PS

Jan 14, 2019 · 7:45 AM UTC

1
Replying to @MojangSupport
This did not help at all