It is a directive which EU members must implement. The Netherlands is going to implement it in 2021. [1] I am unsure about the deadline for implementation.
You can try something like putting your router in bridge mode. For example Ziggo here allows that. KPN already allows free choice of "modem" (read: router). And a Fritz!box can be used as bridge if you use PPPoE client elsewhere. There's even PCI(e) DSL modems. A recent example [2].
I've dug a bit more into this, and apparently the law is not yet in effect in France either, but still being discussed. The curious can track the progress at [0].
Regarding bridge mode, I'm only aware of one ISP in France whose box allows doing that (Free). In my case there's no such option, it can only work as a router.
Regarding bridge mode, I'm only aware of one ISP in France whose box allows doing that (Free). In my case there's no such option, it can only work as a router.
[0] https://www.senat.fr/dossier-legislatif/ppl19-048.html