Yes, physical readers exist, how will inserting my ID card into a reader tell reddit that i'm an adult and that i can jerk off to gonewild there?

The EU digital id, ncluding the age verification part is (unless they fixed it already) limited to hardware attested, non-rooted, not-unlocked androids and apples for now. If you want to jerk off to porn, you're basically mandated to buy an american device (well, you will be, unless they fix it).