This covers the entire situation really well: https://iabeurope.eu/wp-content/uploads/2019/08/20160516-IABEU_Guidance_AdBlockerDetection.pdf

And the most important part:

> The Article 29 Working Party is an advisory body and its opinions are not binding – but their opinions showcase that the legal situation regarding ad blocker detection is far from clear.

So this is a huge nothingburger. Only the courts can decide.