How To: Figure out what woke up your mac last

Sources:
* Wake reasons 1
* Wake Reasons
* Shutdown Causes
* Extensive List of Mac Shutdown Errors

See what woke up your mac last
pmset -g log|grep -e " Sleep " -e " Wake "

Last shutdown causes:
log show --predicate 'eventMessage contains "Previous shutdown cause"' --last 24h


Review the list of shutdown causes to see what the problem may be