Today - 25 July - is the deadline for user-to-user services subject to the UK's Online Safety Act to have "highly effective age assurance" in place for UK users, if the site's content requires it. (Not all sites/content require age assurance.)
Please be careful, especially if you are in the UK.
Think before handing over ID documents, and be especially mindful of mistyped URLs and other scams, trying to obtain your personal data for phishing or blackmail purposes.