Can't see my Time Machine backups
I destroyed my new 14" M1 MacBook Pro by pouring a pint of fine craft IPA on it. I went to retrieve its Time Machine backups to install later on a replacement machine once it arrives, but they don't show up. My wife has a MacBook Air and I have a 2012 Mac Mini (that I use for running PowerCADD on Mojave since that app isn't 64-bit yet). Both of those machines back up to TM and both can see their respective backups but not each other's; neither can see my MacBook Pro's backups. How do I locate the latter?