@topflixapp-tv said:
Search Endpoint - Add with_watch_providers and watch_region params
Can I make a request for one of two API additions:
Search Endpoint: Add with_watch_providers and watch_region params
Discover Endpoint: Add search_query param
If this is something that already exists, apologies for the question. I was unable to locate it in API documentation.

Watch Providers and Region

I believe that these 2 new filters &with_watch_providers= and &watch_region=
have already been created and can now be used with get / discover / movie.
And they have already been added to the Developers page.
https://developers.themoviedb.org/3/discover/movie-discover
See the note at the beginning:

Date                Change  
January 2, 2020     A new set of filters are available for watch provider filtering. Check out with_watch_providers and watch_region.  

And see the two options at the end of the list:

with_watch_providers    string  
A comma or pipe separated list of watch provider ID's. Combine this filter with watch_region in order to filter your results by a specific watch provider in a specific region.  
optional  

watch_region    string  
An ISO 3166-1 code. Combine this filter with with_watch_providers in order to filter your results by a specific watch provider in a specific region.  
optional  

What remains to be done is to make the list with Watch Provider IDs available.
But it's already on the To-Do list:
https://trello.com/c/fwjXt8vs/100-create-a-list-all-watch-providers-endpoint

EDIT
But, if the anxiety is great, and the list is not out yet, I suggest making
an API Request like get/movie/{movie_id}/watch/providers
https://developers.themoviedb.org/3/tv/get-tv-watch-providers
Using the ID of a very famous and currently requested movie, for example Tenet (2020).
The answer will probably be all wp with their respective IDs.

@ticao2 thanks for the response - I am aware of the 2 new filters "with_watch_providers" and "watch_region".

My ask was if Discover can get an added param (search_query), or Search can get the added params "with_watch_providers" and "watch_region" so that I can search via a search query within specific watch provider(s).

@topflixapp-tv said:
@ticao2 thanks for the response - I am aware of the 2 new filters "with_watch_providers" and "watch_region".

My ask was if Discover can get an added param (search_query),

Not.

or Search can get the added params "with_watch_providers" and "watch_region"

Not.

so that I can search via a search query within specific watch provider(s).

Can you give two or three examples of arguments you would use in the Query parameter?

@ticao2 Imagine I want to search via a string in just Netflix | DisneyPlus:

"av" may return Avengers and Aviator (because the two returned titles contain the search query as well as reside on Netflix or DisneyPlus) "fam" may return Family Guy, Modern Family, F is For Family (because the two returned titles contain the search query as well as reside on Netflix or DisneyPlus)

@topflixapp-tv said:

@ticao2 Imagine I want to search via a string in just Netflix | DisneyPlus:

"av" may return Avengers and Aviator (because the two returned titles contain the search query as well as reside on Netflix or DisneyPlus) "fam" may return Family Guy, Modern Family, F is For Family (because the two returned titles contain the search query as well as reside on Netflix or DisneyPlus)

I think I understand.
I believe that it is not possible with a single API Request.