How can I combine two esternal colections?

[_Frank]

I want to use in one list, more external collections.
Firstly I have two APIs in this two collections:

Than I want to create a list of them:

I need more than 2 but I need to figure it out how do I do this first.
Is it even possible? Because this is something crucial in my app.

[Rozza]

You need a third party service. I use Xano to do something similar. Querying two endpoints, merging the results and using that as a singular endpoint for Adalo treat as an external collection.