Pls help figure out the technical issue with attached image

Hello,

Apart from the other 'faults', there is also a problem with the white balance/colour temperature as well as lighting. The wall isn't white!

Have a read of this from Adobe about how to create better photos:
https://helpx.adobe.com/stock/how-to/tips-stock-image-acceptance.html?set=stock--fundamentals--adobe-stock-contributor

Your phone mistook the fine details in the clothing as noise and "optimized" that:

Then, sharpening introduced a halo between the main subject and the background:

And finally:

Your picture is underexposed, as the histogram shows. There are no whites in the image.

If you view the photo at 200%, you can see a white halo between the dark and the light areas. Especially, around the dark jacket and whit wall.