Does laser hair removal work on males? Is its effectiveness consistent across different body parts?

I had 9 sessions of Alma Soprano Titanium last year for my upper lip, lower lip, and chin with sessions spaced 4-6 weeks apart. However, there was minimal hair reduction. Four months later, I tried another diode laser (Vikini) on the same area. After 3 sessions, I noticed a reduction in my upper lip and chin, but some parts of my chin still have coarse hair, and there was no reduction on my lower lip. Should I continue? Is laser hair removal permanently reduce other parts of the body like pubic?