It's important to remember that being gay doesn't look one way. While one gay man might come across as happily flamboyant and enjoy wearing stereotypically 'feminine' outfits, another may not. Being a gay man is defined by attraction to other men, not a dress sense or appearing "camp".
Gay stereotypes and myths can have severe mental and physical health consequences. It wasn't so long ago that it was illegal to be gay in Britain. While areas of society have progressed, it's important we continue dismantling harmful misconceptions to create safe spaces for LGBTQ+ people to be themselves.
Questioning someone's sexuality because they appear feminine is extremely outdated.
Just my opinion on the matter