The Microsoft Graph beta API (here) allows us to POST new applications to Azure AD (v2.0).
If I post these applications to a specific tenant, using a url like this:
If I post these applications to a specific tenant (which is an Azure AD v1.0 tenant), using a url like this
Here there is no version definition for the tenant. V1.0 and V2.0 are the endpoints, not means tenant. You could know about their difference from Azure AD v2.0 endpointand v1 and v2 comparison.
If you register the app in the Azure portal, the app is v1 app; if you register the app by using App Registration Portal, the app is v2 app.
and also authenticated without a user, where can I view these applications? They certainly aren't on my apps.dev.microsoft.com page, and they also aren't in the list of registered applications in the tenant on portal.azure.com
If you create the app in the App Registration Portal, the app could be seen in the apps.dev.microsoft.com page(App Registration Portal), but cannot be seen in the Azure portal.
If you create the app is v1 app, the app can be seen both in Azure portal and App Registration Portal.