Yeah Overwatch came out in 2016 and was in development for a while, at least 2013. It was on the cusp of developers still trying to cater to "gamers" and just going for diversity.

You could say that they were already pushing for diversity in some ways, but no more than Street Fighter was decades earlier. It wasn't until they started getting "feedback" in terms of progressive leftists on twitter that they started doing thing like making characters gay.