I'm worried about my receding hairline. Which hairline procedure would look the most natural?

Since I was young, I have had an M-shaped hairline on both sides of my forehead, so I am self-conscious about it whenever I tie my hair up or wear it in an updo. It is fine if I cover it with my bangs, but my hairline becomes visible whenever the wind blows or my hair gets even slightly messy, which is actually quite stressful.

At first, I was thinking about getting a hairline tattoo, but after doing some research, I found out that there are also options like hair transplants or using fillers on the forehead. Each has different pros and cons, so I'm having trouble deciding which path to look into.

Rather than simply making my forehead look narrower, I want the M-shaped curves on both sides to connect naturally so that I look like someone with a naturally beautiful hairline.

For those of you who have undergone treatment for similar concerns, which method did you choose? I'm also curious about your satisfaction after the procedure, as well as what I should focus on checking during the initial consultation!