There is a similar thread, which was posted a few days ago.
And some old one:
The current state can be found in our official documentation: Sentinel - Turris Documentation
I don’t want to spoiler some things as there’s going to be a blog post about it related to Turris OS 5.1, where you see some new/updated things related to the data collection system and some of them can be already found in the development branch (HBL).