Here is an overview of related restrictions in other countries [1]. Actually, in many European countries, Google does not grant access to Gemini for people under 16yo [2,3].

[1] https://www.bbc.co.uk/newsround/articles/clyd1dvrll1o

[2] https://support.google.com/accounts/answer/1350409

[3] https://support.google.com/gemini/answer/16109150