euCONSENT is a European Commission funded project to create an interoperable network of AV providers. It began a pilot of its technology in February 2022 with over 1,600 participants across 5 countries and will go live this summer. This will allow you to prove your age once with an AV provider and then re-use that same check many times over with other websites, even if they use a different AV provider.
So, if today you buy a bottle of wine as part of your supermarket order and are asked to prove your age, tomorrow, you will not need to repeat that process to access a pornographic website.