Buy European

JustWatch is a kind of search engine that helps you find out which streaming services has particular movies or TV shows. It supports many countries, so if there are local streaming services in your country, they might be included in JustWatch. JustWatch is headquartered in Berlin, Germany.

JustWatch has a genre called "Made in Europe". You can find it by first clicking Popular at the top of the page and then Genres in the filtering section. Somewhat confusingly, it includes movies and TV shows not made in Europe. The banner image at the top of the page says "Co-funded by Creative Europe MEDIA Programme of European Union" which might explain why non-European shows are included. But it does contain many European movies and TV shows, and you can filter and sort them to find content that interests you. Check the production country under "About the movie/TV show" section if you want to be sure it's produced in Europe.

PS. This is a direct link to Made in Europe for UK users: https://www.justwatch.com/uk/made-in-europe. It's better if you go through the front page so that the page can detect your country and provide you content tailored to your country, such as the available streaming services.