@karmaoffallwnr hi there you can use 1.16.4 mods in 1.16.5 and vice versa also to add / install mods make sure you have fabric API installed from the addon marketplace, navigate to .minecraft/libraries/me/deftware/EMC-F-V2/latest-version
put your mods there and make sure they are fabric mods
K
KarmaOFFallwnr
@KarmaOFFallwnr