The /locate stronghold command in the most recent forge 1.16 version isn't working; it just says "Could not find that structure nearby". I am using Oh The Biomes You Go, Atmospheric, and Better Default Biomes along with your caves and mineshaft mods.

Use /locate betterstrongholds:stronghold

Lol you got it! (Don't worry about the message before, I just thought it was funny)