There are plenty of LGBTQ+ actors and people who want to get their foot in the door of the industry, who would love to be part of any of these films, who are constantly ignored or pushed aside because studios feel more comfortable working with straight actors despite how progressive they claim to be
When it comes to telling our stories, they don't want us being involved in the telling of them
There are two definitely salient points here. For a story like this I think it's more important to have people from the trans community involved behind the camera to craft the story than to cast a trans actor for the role. If casting decisions were made like that, a lot of LGBTQ actors would lose out on cis character roles.
At the same time, it absolutely is terrible that LGBTQ actors aren't more often considered for roles relevant to their sexuality because of studio discomfort. Trans actors especially suffering from long held "icky" prejudices and THAT absolutely is disgusting.