In the Google Actions panel we can enable account linking. We can also specify Authorization URL (Endpoint for your sign-in web page that supports OAuth2 code or implicit flows) and Token URL (OAuth2 endpoint for token exchange). Endpoints configuration image
I don't see any configuration options for Token revocation endpoint, and this possibility is described in the documentation: https://developers.google.com/identity/account-linking/unlinking#token_revocation_endpoint
If you support an OAuth 2.0 token revocation endpoint, your platform can receive notifications from Google. This lets you inform users of link state changes, invalidate a token, and cleanup security credentials and authorization grants.
Where can I set Token revocation endpoint to receive requests when a user deletes a Google Account link directly in their account?