Connect to PMM repository database

as I understood, PMM used to use MySQL server as a backend database for its repository
From configuration page ,I can see that in the new version database is SQLite3

Did you change the backend database for your repository?
​​​​can i aceess this DB somehow and use metadata information?

Yes, we switched to using sqlite3 for some data. We do not support accessing it. What are you trying to do? Maybe there is a better way.