Lots of startups use Google’s productivity suite, known as Workspace, to handle email, documents, and other back-office matters. Relatedly, lots of business-minded webapps use Google’s OAuth, i.e.

Well, if you delete your Azure tenant it's gone and that "trust" between Oauth and SAML keys is gone. So, no, this problem is specific to Google and the public OAuth API it has. It's not reliant on a ...