Time machine no longer backing up
I have upgraded my MacBook Pro with Intel silicon (2016 15") through the last two iOS versions and lost time machine backups. I did see an added hard disk volume that I recall was possibly the culprit. On Monterey now, latest this PC can use.
My job requires consistent backups, but I cannot do it. I want a new laptop, but need to get this one backed up.
Thanks for any suggestions!
Ed
MacBook Pro 15″, macOS 12.6