Can answer my own question here:
Crosspost to the other Forum Topic that was VERY helpful
After spending hours, trying to figure everything out. I managed to get it up and running on UE4 and UE5. I uploaded a Video showing the process.
Software reqs: Visual Studio 19/22 (doesn’t matter) with “Developing Games with C++” enabled.
Android Studio 4 (can be newer as well but 4.0 works for sure). Install SDKs and NDKs directly through Android Studio 4. I´m telling you, saves a lot of time. What SDK and NDK?
Its telling you once you plug your Developer enabled phone in.
And then set the SDK JRE and NDK path manually in UE5.
This works for AR / VR and Mobile Development. Hope I could safe someone some time!