Thank you for posting in Q & A.
There are two main deployment types for Azure App Service:
The multitenant public service hosts App Service plans in the Free, Shared, Basic, Standard, Premium, PremiumV2, and PremiumV3 pricing SKUs.
The single-tenant App Service Environment (ASE) hosts Isolated SKU App Service plans directly in your Azure virtual network.
The features you use will depend on whether you're in the multitenant service or in an ASE.
Uses cases and features
https://learn.microsoft.com/en-us/azure/app-service/networking-features#use-cases-and-features
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