The procedure for how to move the system databases is documented here: https://learn.microsoft.com/en-us/sql/relational-databases/databases/move-system-databases?view=sql-server-ver16.
Note that the procedure for moving master is not the command you had above.
Unfortunately, these new databases are not documented in this topic. These databases are used when you set up a new Contained Availability Group, so if you are not planning to use that feature you will not need them. Then again, what happens if you just stop SQL Server and move them elsewhere, I don't know.