A recent Cohh Carnage stream introduced me to Solasta:
www.solasta-game.comhttps://www.solasta-game.com
It is a turn based RPG using 5e rules, though the game is not set in Faerun.
I'd say that the combat implementation is more advanced than BG3 at this point, as they have implemented features that players have been complaining about (the lack thereof) in BG3.
For example, in Solasta you can delay your actions and choose when to use reactions, it is pretty well done.
I think it deserves a look, as it can help you with future implementation.

Last edited by Danielbda; 23/10/20 03:56 PM.