is it still a recommended practice and being actively maintained?

I am curious if this is still a recommended practice and if so is this project being actively maintained?

if it is, I would recommend adding to the architecture diagram how the SaaS provider can initiate communication - e.g. for an API call

No file or test is named. Start by locating the existing architecture diagram and related project documentation, then verify whether the described practice remains recommended and how SaaS-provider-initiated API calls should be represented. Done means the recommendation is clarified and the diagram documents the communication path if appropriate.

Written by the indexing model from the issue text.