I can't speak to the AP Literature courses other than the AP Literature curriculum is designed to prepare its students for the AP literature exam. Until the entire examination process for AP courses is overhauled, I don't see that changing.
For college courses, it depends on the specific institution, department, and instructor (sometimes). Some institutions that are more conservative in nature by location or what have you may simply omit LGBTQIA+ writing/authors out of ignorance, fear, or worst case hatred. However, if that isn't the issue, the English department may have specific reading it requires students in introductory level literature classes to read and the instructor may not have a choice in which writing or authors they assign from term to term. Usually when students get to their upper-level coursework in English for more specified themes of literature, those instructors to tend to have more freedom in their choice of assigned readings.
If you do wish to see more LGBTQIA+ authors and writing in your English literature coursework, I would suggest bringing that feedback directly to your teachers, instructors, professors - whatever their job title as soon as you're able to. Don't wait until the end of the semester/quarter because if they do have any freedom, student feedback makes all the difference.