Hello, here i will be going through my process on how I sculpted the expressions for the arkit face rig also making use of the facit face rig addon, enjoy.
Faceit addon: https://blendermarket.com/products/faceit
Facit addon tutorial by CgDive: https://youtu.be/KQ32KRYq6RA?si=_pNc4WAN5Fh5OsRd