Welcome to the forum!!!
For a masculine appearance malar cheek implants are most often used.
You are correct about submalar implants being utilized to fill hollow areas in the face.
I am an unpaid volunteer super moderator. I receive no remuneration from this site. Although I am a medical professional, any recommendations, statements, advice, or opinions I provide are mine, and mine alone. Consult carefully with the medical professional of your choice. All statements, recommendations, opinions, and advice expressed by me are mine personally – independent of the site and made as a forum member only – and do not necessarily reflect those of PlasticSurgerySpot.com.