I don’t know if it’s the same for the EU as it is for the US, but Netflix holds the rights for BNA and to my knowledge very few if any of the anime Netflix has exclusive license for ends up getting a western physical release. Which is a shame because BNA and Little Witch Academia are two of my favorites that I want to own, but like you, importing the Japanese releases just isn’t worth it. I’ve not dug too deeply into this so I’m not going to say I’m 100% correct, hopefully someone else comes and surprises us lol