I guess people have forgotten the difference between the meanings of "promotion" and "depiction". For those who really don't know what these words mean: promotion means to encourage, to support something. And depiction means to show something, to make people aware of something by showing it to them.
Now, Joyland, nowhere in its 126 minutes run supports or encourages or "promotes" homosexuality or anything that is anti-Islamic. In fact, this isn't even the only theme of the film. It covers pretty much every aspect of the domestic life of a lower middle-class Pakistani man and a woman (I didn't mention transgender persons because those poor things have only one class of lifestyle). It shows every harsh reality of our society. It shows all the plagues our country is being devoured by, those which aren't remotely related to Islam but have become a part of our tradition despite being highly toxic. These are the stigmas that we suffer from in our lives but no one wants to get rid of them because they have been here for so long that they have become normal. And a life without them would be abnormal or even disgraceful and shameful according to our "elders".
The film does show the homosexuality that exists in our country. It doesn't tell whether its good or bad, it just shows it. The only thing that could be a negative point in my opinion would be the graphic scenes. They weren't really that necessary.
In the end, I would say that Joyland is probably the best film that's come out of Pakistani industry in a long time. We need to support such films and accept the existence of all the brutalities of the society they make us aware about. And lastly, try to do something about them.