I really thought Larian would break their convention and allow players like me to turn off the minimap and quest markers in Patch 2 as they said the patch would reflect some fans´ suggestions. But now I see they do not want to change anything regarding immersive playing. Unfortunately. I just cannot play this game this way so good bye Larian. I hope GOG will accept my refund.
I'm almost certain there are mods that accomplish what you want and more...
A MOD to turn ON/OFF/Minimize a minimap?
Really?
To me Its like needing a MOD to have the spell book screen.
F10 gets rid of the entire UI.
Some people like playing their Crpg games with no maps at all, or something very minimalist not in your face.
Its called BASIC UI FUNCTIONS. The BG3 MINI map isn&t MINI. Its incredibly large and takes tons of screen space.
Nobody would be complaining if this (minimize, on/off) was on option and already in the game. It makes sense and is a no brainer.