I assumed this already quite common everywhere by now. A Bay area based computer vision company is already providing this tech to many airports across the country and abroad. From what I know citizens have no rights to privacy or constitutional safeguards at the borders.

https://vermontbiz.com/news/2021/december/13/donovan-concern...

https://abcnews.go.com/US/apple-employee-detained-us-border-...