Its proven that there is Androgen receptors in your facial skeleton so:
"By increasing BMP (Bone-Morphogenic-Protein) after acting on the Androgen Receptor (AR). It works in coordination with GH. DHT cuts down water retention, you will see more defined facial traits in people with higher DHT, such as cheekbones, chiseled jaw, and an overall "dry" looking face, no/little facial flush etc."
Study findings from NCBI on effects of GH
"Children who received long-term GH replacement therapy showed increased growth of the craniofacial skeleton, especially the maxilla and ramus. These findings suggest that GH accelerates craniofacial development, which improves occlusion and the facial profile."
So GH and Test:
- Increases growth in jaw area
- Defines face from less water
Whether or not these effects make someone more handsome is up to you as beauty is in the eye of the beholder.
I cannot believe I just researched and compiled an answer to this.