Connect-VIServer -server <vcsa_fqdn>
Get-EsxSoftwareDepot
Get-EsxImageProfile
Get-EsxSoftwarePackage
Power CLI 12.X, 13.X
vCenter Server 7.0 and 8.0
It is an expected behavior as ImageBuilder does not have any public APIs or PowerCLI cmdlets since it was only meant as a backend for the UI.
When a software depot, Image Profile, and Software Package is created in vSphere UI, It will not show up in PowerCLI.