How to deploy a .pkg with Profile Manager
mdmctl is part of the open source MDM, MicroMDM. As far as my research has gone, Profile Manager does not support the InstallApplication MDM command that enables an admin to deploy packages to clients. If you have mdmctl, then you may have MicroMDM setup already, and you should reference their documentation for deploying apps. See https://github.com/micromdm/micromdm/wiki/Quickstart.

If you are just looking to deploy Microsoft Office 2019, you could "purchase" the apps for free using VPP and Apple School Manager or Apple Business Manager as a DEP solution. Once you've purchased the apps through the DEP portal, and assuming you've tied Profile Manager to your DEP account, you can then push the apps out. Apple documents what MDMs need to deploy apps, but their own Profile Manager does not support this functionality. I found this page in hopes of getting Profile Manager to deploy a munki package, but I still haven't found anything indicating that it is possible.


DEP Starter Page: https://support.apple.com/en-us/HT204142
Office 2019 in App Store: https://support.office.com/en-us/article/microsoft-office-and-the-mac-app-store-ad2293a8-f5aa-4652-ae3f-83dda906d748