@pajatopmr said:
Streaming services grid replication
The account settings endpoint shows a grid of available streaming services via "My Streaming Services".
I would like to replicate this grid in a mobile app, dynamically (for updates/changes)
and add at least one extra field for the mobile app id (obtained apart from TMDb).
I do not see an easy, accessible API interface to duplicate this grid so I'm guessing there is none.
Would that I am wrong.

I don't know if it solves your question, but...
I believe that this Grid varies depending on the country.
I think that the services available in a country can be listed with these API Requests.
https://developer.themoviedb.org/reference/watch-providers-available-regions
https://developer.themoviedb.org/reference/watch-providers-movie-list
https://developer.themoviedb.org/reference/watch-provider-tv-list

Assuming I am right, is there another way to
1) get the raw data that would allow me to build the grid into a mobile app, and
2) automate the process to occasionally get updates/changes?
Is the grid buried somewhere in the daily database drops?
Is this grid supplied by JustWatch perchance?

I think so.

Lastly, again assuming I am correct in that there is no API access to the grid info now,
is there a reason why TMDb might not ever be able to add it to their API?

This is an excellent response and demonstrably shows how to accomplish what I would like to do. Nicely done! Definitely a case of me being wrong and now very glad to know it.