>TABLE 2. USER AGENT METADATA FIELDS (“CLIENT HINTS”) SENT AS PART OF YOTI’S AGE ESTIMATION METHOD

As far as device fingerprinting goes, this is pretty tame, compared to what something like chatgpt does: https://www.buchodi.com/chatgpt-wont-let-you-type-until-clou...

The far more concerning part are your pictures/document scans getting sent to them.