Nobody expects lectures about gender identity, sexual orientation or LGBTQ history in an elementary school classroom. Your argument also doesn’t matter, because they are working in some states to prohibit this topic in all of K-12. When we say “erasing identities”, we are talking about the stigma that is introduced and the harm caused when LGBTQ-related discussion is completely barred from a classroom. Teachers are gay. They are trans. Kids or their families are the same way, and nobody should be prohibited from hiding this or being unable to ask questions to understand, someone can transition to be a different gender and someone can live people of the same sex, and nothing about that is “grooming”.
In states like Alabama where they just implemented an already existing restriction on gender reassignment surgery for persons under the age of 18, they are as clueless as you about what healthcare trans kids really receive. Most of the time it is puberty blockers and hormone therapy, which kids have taken for years for reasons unrelated to transgenderism and only now is the right taking issue with it. Usually underage teens can’t receive top or bottom surgery unless in some exceptions where the parents agree.
Gender-affirming care has been proven through research to provide mental benefits to transgender youth and is endorsed by the APA. Banning this is suicide, and the right doesn’t care about the well-being of trans people.