With so many (old) apps disappearing from the playstore (probably because of EU compliance rules), I wonder why it’s so hard to pirate apks. Is there a source I’m missing?

For example, I’m currently looking for Last Horizon by noodlecake, it’s not available in the playstore. I can’t find it anywhere, I searched all the linked sites in the wiki. This happens everytime I’m looking for an app, it seems like only a very small amount of apps can be found