To install create a win7 64 bit bottle and install steam into it.
Use steam to install Final Fantasy 12 The Zodiac Age.
Run the game then immediately quit and edit ~/Documents/My\ Games/FINAL\ FANTASY\ XII\ THE\ ZODIAC\ AGE/7656119805199804/GameSetting.ini
Read down the file and change Vsync to off.
Set crossover for performance graphics and the DXVK backend.
I'm about 3/4 through a play-thru and the only problems I have so far is a few missing textures. This is on a M1 chip.