Of course, the error may not be in Time Machine itself, could be how Disk Utility sets the drive up, or even in APFS.
When I look in Finder, what's shown for the disk I am now using looks nothing like what I remember the same volume that was previously created in Big Sur. (I had to erase that after power failure)
Now all I see is Kind:Volume and with that items that are Kind:Time Machine Backup. Previously I'm sure I saw a Volume, named after the back up, and within that a container with an identical name and the backups within that
Also, given it's now working after a fashion, when I use Finder to look at the individual backups, Finder tells me I have "Unknown Access" - how can that be? Surely either I do or I don't.
When I look in Finder, what's shown for the disk I am now using looks nothing like what I remember the same volume that was previously created in Big Sur. (I had to erase that after power failure)
Now all I see is Kind:Volume and with that items that are Kind:Time Machine Backup. Previously I'm sure I saw a Volume, named after the back up, and within that a container with an identical name and the backups within that
Also, given it's now working after a fashion, when I use Finder to look at the individual backups, Finder tells me I have "Unknown Access" - how can that be? Surely either I do or I don't.