nike is definitely involved lol. Maybe the ideas/inspiration originates from teams but most of the time nike executes the designs. Miami is probably the only team that does so otherwise:
Plus there’s at least 2 designers who designed multiple styles: Dustin Canalin designed GSW Town, and 2017/18 76ers, nets, bulls city editions. And Cyrus Coleman designed Wolves Prince and Hawks MLK and even Mamba jerseys (even tho Kobe was the inspiration).
https://news.cvad.unt.edu/alum/coleman-cyrus. And they both worked for Nike, not teams
highly unlikely that all 30 teams are allowed to reuse city editions in the same season, because then city edition program would be dead lol. jazz and grizzlies have straight up cancelled city editions before so it can’t all be about $$