"This tool is not available to users under the age of 18 or in certain countries or regions."
Exactly. I'm not under the age of 18 and is located in the EU region, thus cannot use this service for no other obvious reason. I guess Google feels it is more convenient to just block EU users from services like this than it is to try to comply with EU regulations.
Remember the faceswap apps that were doing the rounds a while back?
The most egregious violators of privacy and ingestors of PII are often the most trivial of 'cool tech demos'. This being Google doesn't make it any different - particularly after their egregious violations regarding their Incognito Mode.
They're reigning themselves in before they're smacked down again for naked profiteering, not 'punishing' the EU for imposing a 'success-tax' as the reductive consensus from Americans seems to be.