Import-AzAutomationRunbook without -Published switch should do the trick right?

No, at least not with how the Cmdlet is now, "all" that does is create a new runbook utilizing the provided PowerShell.

I checked the debug logs and it does make the desired call during it's execution but I needed it to be able to add a draft an existing runbook.

No, at least not with how the Cmdlet is now, "all" that does is create a new runbook utilizing the provided PowerShell.

I checked the debug logs and it does make the desired call during it's execution but I needed it to be able to add a draft an existing runbook.

It does work with an existing runbook if you use -Force I just tested it:

You can see the creation date was not updated as it just updated the draf; also confirmed it updated the draft version while the current published version is in place:

Thank you for posting this out!
Though, it would be helpful if that was outlined in the documentation