Help needed! QgroundControl doesnt detects Serial Ports

Hi everyone, I am stuck in an issue with QgroundControl.

My version of QGC on android doesnt detects Serial Ports at all when I try to add a new comm link. Its always “No Ports Available”. This is happening only on Skydroid H12.

So I asked Skydroid people and they sent me a custom QGC apk (old version 4.1.7) and this one detects Serial ports and works fine.

My issue is, I have to add some custom code in QGC, and as I do not have the code of the custom build Skydroid people sent me, I can only do that in new version, but this one doesnt detects Serial Ports at all. Can anyone help me figure out a workaround?