Azure PremiumV2 app service plans lose the ability to attach remote debuggers over Standard app service plans:

Remote debugging: When you scale your app to PremiumV2, you will no longer be able to use remote debugging for your apps. If you scale your App Service plan to a lower tier, you will be able to use remote debug again.

• Even there is an option of Remote Debugging in Azure Portal,the debugger is not attached to it.