Hi,
You have done a great job with all that!
You have pinpointed the thing that do not work. Here is the guide for the process Running Netcam Studio Server on SSL / HTTPS - Windows 10 and 11
I assume that you have used a self signed certificate for testing. Using the NCS App do not work with self signed certificate in Android. It is a problem with the Android OS. It works for some versions and for some versions not. It always work with iOS.
We worked through this for some months ago and find this discrepancy. At that time the user bought a certificate for 8 USD and then it worked.
-Henrik