iMovie does not see my Mini DV tapes
The general consensus is that any operating systems after Mojave break compatibility with Mini DV or they're not as reliable as older versions of Mac OS. LifeFlix is in active development, and it even works with the new M1 chip.
Alternatively, if you have access to a Mac with Mojave or earlier, or you can boot the Macbook Pro off a portable SSD running Mojave, you can use Apple's AVCVideoCap: https://www.cuttingcords.com/s/AVCVideoCap.zip