Masseter Hypertrophy affects ramus length positively

[future chadlite]

 

[VST]

You should try to hypertrophy your masseters regardless. They give you solid jawline gains.

 

[mojopin]

If you look at Astro Sky you can see where his ramus got defined which he said originally merged into is neck before he found out about mewing:
https://www.youtube.com/channel/UCyy_kETc7LrFPjwgVod1_Mw/videos