My waypoint didn’t turn into a Pokéstop.why?
Welcome to the forum! Most of the time the reason is that the Wayspot is not alone in a Level 17 S2 cell. You can read how this works here: https://pokemongohub.net/post/article/comprehensive-guide-s2-cells-pokemon-go/
If you would like to leave the name and the gps coordinates (in your submission email near the end) then someone can verify this is what happened.