Many users are not happy with Persona as the provider for age verify service due to privacy concerns.

An alternative is KWS, https://www.kidswebservices.com/ a subsidiary of Epic Games, the anti-cheat provider for EasyAC.

Notably KWS offers age verify (depending on country) through less invasive methods than persona such as a "small refundable charge on a credit card". This may be preferable for users which are privacy conscious while still being adequate for reliable age verification.

KWS is considered robust enough for AAA games and platforms with millions of users. I don't know the specifics of implementation but I have verified with KWS for a service and I found it to feel less invasive than Persona's age verify.