ERIC
ERIC is a collection of articles on education and for educators.
If I search for sources on YA literature, I see that Adolescent Literature is the Subject Terms that will find me all the articles on that subject in this collection.
My second search image below shows a search of Adolescent Literature as Subject AND LGBTQ OR sexual identity.
Note that the same search in One Search, also linked below, will also return articles and books on that topic - and it will return more of them, because it searches in all library databases at once.
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Every academic field and profession has a body of professional literature. This page provides leads to finding the conversation on YA literature for educators.