Progress bar after verbose startup
A few weeks ago my Mac Mini (2018, running Ventura 13.3.1) started taking at least a minute longer to boot than it had before. I hadn't added any new software.
I turned on verbose mode. I see the command lines whizzing by for about 20 seconds, then the screen changes to the apple with progress bar: the progress bar moves to somewhere around the middle, stays there for about a minute and then finally moves on again and I get to the login screen.
How can I find out what is going on while the progress bar isn't moving?
Mac mini, macOS 13.3