In case anyone is interested: There are plenty of companies around.

Both apple and Facebook acquired eye tracking companies to kickstart their own development.

Here are some Top-lists

https://imotions.com/blog/insights/trend/top-eye-tracking-ha... https://valentinazezelj.medium.com/top-10-eye-tracking-compa...

Its also an active research field, this is one of the bigger conferences: https://etra.acm.org/2023/