🔍 Can Minoxidil improve an M-shaped hairline?

My forehead has always been on the wider side, but as I get older, I'm worried that the sides of my forehead seem to be getting thinner.

I usually cover it with my bangs so I didn't pay much attention to it, but when I sweep my hair back or expose my forehead, I realize that the M-shaped hairline on both sides is worse than I thought. Comparing it to old photos, it looks like the hair near my forehead has thinned out, so I'm worried whether my forehead was simply wide to begin with or if I am actually experiencing hair loss.

After doing some research, I found that women can also experience thinning hairlines and that some manage them using Minoxidil. However, I've heard that once you start using it, you have to keep using it, and since I'm not sure if it's effective for the hairline, I'm hesitant to start.

Has anyone actually tried using Minoxidil for their bangs or M-shaped hairline? 

I would like to hear your experience: whether you noticed any changes after use, such as new hairs growing or even slight filling in of sparse areas, and how long it took to feel the effects.