It’s not at all unusual for homosexuality to manifest itself at that age or earlier. Of course there is no sexual desire at that age, because the hormones aren’t active before puberty. So perhaps homosexuality is the wrong term.
But for example gay men will often tell you that they were either very effeminate as boys, or liked playing with dolls or dress in girls clothing as early back as they can remember. When you ask them at what age they knew they were gay, the
“In their 1995 report, Bailey and Kenneth Zucker revealed that, in retrospective studies (the second method used to examine the relation between childhood behavior and adult sexual orientation, in which adults simply answer questions about their childhoods) 89 percent of randomly sampled gay men recalled cross-sex-typed childhood behaviors exceeding the heterosexual median. ”
There’s a reason parents since the dawn of civilization have worried when their son put on makeup or played with dolls. It usually meant: no grandkids from this one.
Of course nowadays the waters have become murky, since kids are bombared with propaganda in schools or from celebrities as you mentioned that being lgbt is hip. It also means you become untouchable to bullies. Any bully picking on a gay kid these days is harshly punished, while bullying disabled kid or autistic kid or just normal white kid is all but encouraged. Kids will do virtually anything to avoid being bullied. So nowadays you have a lot of “fake gay” kids trying to jump onto the gravy train.