Windows has always done this and so do many others. I very much doubt that the EU would fine Microsoft for it. Since when was extended support against EU regulation?

Companies like redhat do the same thing for end of life software: access.redhat.com/articles/rhel-eus

I’m not familiar with Suse but it looks like they pretty much do the same thing: www.suse.com/…/long-term-service-pack-support/.

Ubuntu too: ubuntu.com/security/esm

Of course IBM: www.ibm.com/…/ibm-security-extended-support

And many others.