Well proton isn't Eu but its switzerland and I think that proton is going to move some of their servers to germany after switzerland had this questionable decision which feared privacy services (including proton)

Proton recently got proton sheets/proton docs

Personally one of the largest issues I have with proton is the lack of extensibility. Like google has app scripts and similar api's but proton's lack of api's have frustrated me so much that I have built an api over scraping/using a puppeteer instance over it but its still in very finnicky state