It's tricky because the "rules" aren't written down anywhere — the rules, i.e., what "they" demand you avoid, and what they won't notice or will pretend not to notice.

In some places, a book is removed from the library whenever a parent complains about it, regardless of whether the complaint is factually accurate, since the librarian doesn't have time to read every book to fact-check and argue and isn't authorized to contradict the parent anyway. The parent is really complaining about their perception of the author and/or what they claim the book contains (true or not). So the risk to you as a children's author is: The more famous you get and the better you're known as an LGBTQ-inclusive person, the more someone wants to target one of your children's books they haven't read.

Have you joined Authors Against Book Bans?