This topic has been discussed here endlessly. There are a bunch of factors that allow or encourage lawn moss to grow and unless you can rectify them all permanently, the moss will inevitably return>

Do some research = you can start here: https://www.lawndoctor.com/blog/lawn-moss-control/

Congradulations! I love moss.

My motto is, if it's green, it's good. What wrong with moss? Why waste money on nasty chemicals bad for the environment? Why stress? Lawns do not need to be a monoculture of grass with every blade identical. That's bad for the environment.

Why do you have moss, because the soil, water, shade, etc are better suited for moss than grass. You can't change that with chemicals. Moss is not an invasive weed. It's a native.