There is the armor master feat, which is not in BG3 but in DD5 and it does that:
Source: Player's Handbook
Prerequisite: Proficiency with medium armor
You have practiced moving in medium armor to gain the following benefits:
Wearing medium armor doesn't impose disadvantage on your Dexterity (Stealth) checks.
When you wear medium armor, you can add 3, rather than 2, to your AC if you have a Dexterity of 16 or higher.
I was wondering, do you believe that this feat is going to be released?
