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Update,
Updated Pages on the main iMac, Updated Pages on MacBook Pro and it worked, took seconds to download.
Working on app updates but not system updates?
 
Update,
12.4, All updated, content caching working on intel and M1 Macs now.
Only issue is with Silentknight XProtect, MRT, Gatekeeper updates,
You have to turn off content caching for SilentKnight updates to download then turn back on and reboot.
 
Update
Monterey 12.5 update, content caching does not work on Intel
2015 21.5" iMac,
2015 13" MBP,
2015 15" MBP,
2018 13" MBP,
2017 15" MBP,
2017 13" MBA.
But it worked on M1 Macs
 
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