I was interested in the others, but https://www.internetarchive.eu is a horrible corporate-looking site with a hero image, a boast about AI, a carousel of news that won't scroll with doing its slow scroll animation, a huge "meet the team" section with mugshots and boring profiles, social media links, a newsletter signup form, and nothing to say where the actual archive is.

Reading what little information they have there, they aren't a public facing or public serving organization. They seem to provide their services to institutions only:

"working with dozens of European libraries and government agencies to build web collections, Internet Archive Europe prioritized collaboration with cultural heritage organizations to safeguard our collective history."