command line – On MacOS Monterey. Time Machine query: methods to test final backup time, with out having plugged any backup disc and with no Full Disk Entry?

I wish to obtain this equal info, however simply utilizing the command line:

And with this two circumstances (that the GUI would not want as properly):

• No want of any backup (TM) disc plugged.
• No want of the “Full Disk Entry” (for the shell) requirement that, as an illustration, tmutil listbackups (or all these sort of proposals would wish).

I searched the online and that i did not discover any definitive reply. Some promising ones, look now to be a bit outdated. This was probably the most promising (maybe made sense in historic system organizations, sadly not in my case):

 % defaults learn /personal/var/db/.TimeMachine.Outcomes BACKUP_COMPLETED_DATE
2023-04-08 19:05:57.429 defaults[10864:260510] 
The area/default pair of (/personal/var/db/.TimeMachine.Outcomes, BACKUP_COMPLETED_DATE) doesn't exist

Really, there isn’t a .TimeMachine.Outcomes in that folder (ls -a), at the least in my system.