Big Sur 11.3 update not noticed with RECON

Recon is not to my knowledge used to update a Mac OS. It's just used for inventory updates, not policy updates. Can you please expand what you mean by "The update is not being picked up" Picked up by what? Apple or Jamf? Are you using Jamf's patch management to update Mac OS?

after recon the computers inventory in the 'software updates' section was not showing that the 11.3 update was available.

it looks like it's taking time for the 11.3 update to be noticed.

Does your org manage what OS updates can be available or are you just allowing Apple to control that?

A recon wouldn't let the Mac know that there is an update available. A softwareupdate command, or, checking in system preferences would.

Recon is simply inventory of the machine into Jamf.

If you run the 'sudo jamf recon' command from terminal you will see that one of the processes is 'locating software updates' , so im assuming this checks to see if the mac has any available macOS updates. If so the computers software updates jamf inventory information will show how many macOS updates are available.

I was just concerned yesterday because some of the big sur computers here were not noticing the new 11. 3 update. I had to run recon a few times on those particular computers for it to finally notice the update was available.

I believe that will only return the number if the computer is already aware that there is a software update. It doesn't trigger the softwareupdate commandline interface itself, iirc.

Yes i know that it doesn't trigger the macOS software updates to install. It only displays a number of how many updates are available to that computer. 0 if no updates.

I have a policy that installs those updates if they have more than 0 available/pending

Seems like jamf don't know about the latest updates for MacOS
It's not shown in the patch management definitions for Big Sur and Catalina