Slowness in testflight

I have a very serious problem.

1 - I created an application for a client that involves managing purchases and logistics for their company.

2 - I used FF as the frontend and XANO as the backend and DB.

3 - When I test my api calls to XANO via "test" or the browser, they have a response time of less than 1 second.

4 - However, when I went to test my app via testFlight on the iPhone, these same calls with the same parameters are taking around 6 to 7 seconds to return any information!

5 - I need an urgent solution. Is there some kind of necessary configuration that I don't know how to do? Has anyone ever experienced this?

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