It actually is more like a flag in most cases. Specifically, in the case of AB1043, you enter your age or your DOB but then the OS provides an age range (<13, 13-15, 16-17, 18+).

Also, while some bills do seem to require browsers to promulgate age data to websites (e.g., NY SB102A [0]), AB1043 does not. Rather, it requires the browser to read the age range just like any other app, but does't say anything about providing it to sites.

[0] https://www.nysenate.gov/legislation/bills/2025/S8102/amendm...