Is there absolutely no signal determinalble through the global expert on GD/ML/AI based behavioural signal extraction within the social and behavioural signatures of a profile which might indicate that it is principally used by an individual below the age of 16?

If systems cannot be designed to comply with regulatory and legal requirements, then perhaps they should not be built.

Alternatively, reasonable alternatives and methods should be defined in the law.

And you should disclose your employer affiliation in comments such as this.