In Azure API Management, I'm looking at the possibility of appending new operations to an existing API revision.
I can do it in Azure portal like below.

I don't see this flexibility (choosing between update and append) available in the powershell command that imports API https://docs.microsoft.com/en-us/powershell/module/az.apimanagement/import-azapimanagementapi?view=azps-4.7.0
Any help is highly appreciated. Thanks!