I am in Finland and I have Apple TV device and Apple TV many movies are not available, what to do?
How to know if a movie or shows are available in Finland using my Apple TV
You can search for it. If not does not appear in the results, then it is not available.
see here: link-> Watch iTunes movies and TV shows on Apple TV - Apple Support
There's not much to do, as movies and shows have different distributions rights in different countries. And the current distribution channels in Finland may not allow them to be available on iTunes there.