Product : Microsoft Corp, Azure Stack/1903, IaaS + PaaS
Feature : Snapshots, Storage, Infrastructure Services
Content Owner:  Bhagyashri (Shri) Bhagvat
Summary
Snapshots are supported for blobs (limited to 1000 per blob) but not for page blobs
Details
https://docs.microsoft.com/en-us/azure/azure-stack/user/azure-stack-acs-differences