I do not know any EU-only, but ProtonMail is in Switzerland.

Proton is leaving Switzerland because of surveillance and privacy issues.

> Because of legal uncertainty around Swiss government proposals to introduce mass surveillance — proposals that have been outlawed in the EU — Proton is moving most of its physical infrastructure out of Switzerland.

https://proton.me/blog/lumo-ai

They are moving to Germany, but will quickly find that they are going to face the same surveillance and privacy issues since the EU is in the process of negotiating a data sharing agreement under the US Cloud Act.

https://www.justice.gov/archives/opa/pr/justice-department-a...