How long do the effects of the melasma laser treatment last?

I have a question regarding the melasma laser treatment.

I have often seen stories saying that even if you remove melasma to some extent with a laser, it comes back over time.

For those who actually received the procedure, how long did the effects last?

I am also wondering if I will see noticeable improvement after receiving laser treatment for melasma once or twice, or if I need to receive regular treatments to maintain a clear condition.

I would like to know if it is possible for the pigmentation to darken again after a few months or 1 to 2 years, especially since I was satisfied immediately after the procedure.

For those of you who have experience with melasma laser treatment, please share your honest reviews regarding the actual duration of the results and whether the spots recurred.

Does post-procedure care also make a significant difference?