Mass "Mutual Servers"

A way to either
A. Find friends your friends list of servers that both them and you have alike, with a list from each server. This
B. Find friends from the server itself, to see if any of your friends are inside of the server.

This would be useful for server management, and quality of life.
I.E, if I want to quickly see who of my friends like, say, Minecraft, I can search through my friends list for who is in the Minecraft discord server.