It does! Basically any package is offeted. There’s also a mobile app for Android and iPhone. Just take a look at obsidian.md

Obsidian has very rich support scripts and workflows documented for MacOS - I highly recommend it

Disclaimer : not an Apple user, not a lawyer

This should be illegal by European law. Without further knowledge it seems like a prime example for the GDPR letter of death and a pretty solid case for data protection lawyers