This had been the main issue in online gambling. Minors had been flocking to the online Casino site without any restrictions. They can blatantly access gambling sites with their parents' cards, fake their identities and so on. Germany does tackle this issue seriously and recently German Commission for the Protection of Minor in the Media (KJM). had a deal with Incode Technologies, a US-based specialist in biometric identity for the age verification solution.[1]
The German government is very inclined that it will help greatly in protecting minors because of its advanced technology.

Incode Technologies, a US-based specialist in biometric identity, has its age verification solution approved by the German Commission for the Protection of Minor in the Media (KJM).
‘Legal Certainty’ to Providers
The age verification solution provided by Incode Technologies verifies users against data from their ID cards, comparing their image on the card with a real-time selfie.
The technology facilitates the age verification process by providing guidelines to ensure the optimum scan of the ID card and photo of the user and once complete, the service performs tests to confirm authenticity and issues a score.
But I still wonder if this kind of technology is effective enough for those minors who use their parent's access accounts to gambling sites. Will this be able to detect such action? Will this kind of technology can trully protect minors and prevent them to access gambling sites?
[1]
https://www.gamblingnews.com/news/incodes-age-verification-approved-for-protecting-minors-in-germany/The government is playing it's own role in protecting her minors from involving in gambling by providing such age verification tech as they understand the negative effect underage gambling can have on children so it therefore boils down to the parents to act in their own sphere by in assisting the effort of the government by preventing their underage children from easily having access to be it their cards or other gadgets they probably use in accessing these gambling sites.
Just like in the card aspect, they can act as watchdogs by taking time to maybe doing a weekly review of what their card might have been used for by their children and if they find a trace relating to gambling usuage which wasn't done by them (Adult) then some questions could be raised to the child/children (minor) for such utility.