For example: I tried to search all 3 communities from sopuli.xyz featured in this comment https://kbin.social/m/[email protected]/t/2938/Which-subreddits-would-you-most-like-to-see-on-Lemmy/comment/6790/

search for y2kaesthetics did not work
for frutigeraero returned only my comment linked above
only for weirdcore succeeded