Where are you all getting .pkg files to use for package definitions? Some apps don't release their patches as .pkg files. Also. Apple is not providing direct downloads anymore that I can find. Are there secret mirrors or am I just expected to know how to reverse engineer things on my own now?
I download and install the latest app on my machine manually (using whatever means the vendor has provided like downloading a DMG for Skype, for example) then use Jamf Composer to package it into a .pkg file to upload into our Jamf Pro instance for Patch Management and install Policies.
Also, I should add that for macOS installers specifically, I've been using and highly recommend the "DownloadFullInstaller" app from Armin Briegel / scriptingosx.
@binjali For Apple installers you'll find the Mr. Macintosh site invaluable: https://mrmacintosh.com You still won't find any delta updates as of macOS Big Sur, but the site is updated for all new standalone macOS Monterey installers.