Corrupt Volume

My apologies. I hadn't run that procedure since upgrading to Catalina and evidently the commands have changed. I just tired it myself and the text on the screen appeared to be around 4 font size and I could'n't read any of it. With the help of a magnifying glass I entered the first command and hit return. It gave me an error message in the command. So I tried the second comment re reboot and got the same message that you did.

I'll have to do some research into the fsck command for Monterey. Sorry about that.

At a loss at this point as to what to try.

You know you weren't booted into the Recovery volume when that screenshot was taken, right? It's only verifying the drive, not repairing it.

When you tried running First Aid in Recovery what was the warning that you got?

To run fsck on the drive do the following:

1 - Boot into single user mode by holding down the Command + S keys

2 - Enter the following command followed by Enter or Return key:

/sbin/fsck -fy

3 - If repairs are made and reported repeat the command until there are no additional repairs made.

4 - To reboot back into normal mode enter the following command:

/sbin/mount -uw

Great news. 👍