Would like to help my nephew - he might be trans, not sure

I'm usually in other sections of this forum, but lately I've been thinking that I could try to ask some questions here to help my nephew, or at least try to support him if/when needed.

He is 10 now, very young and he is living with his single mother and her mother's sister is living with them as well.

He likes to spend a lot of time with my parents, he cannot wait to go to visit them. What he does is when he gets to my parents' house, he runs to the closet and takes out one of my old dresses from kindergarten (some kind of princess-dress), puts it on and he wants to wear it all the time when he is there. Other times he puts on some other skirts and dresses he finds there.
He told my mother at one point that he hates being a boy and wants to be a girl.

Also he enjoys playing a lot with stuff like toy home appliances and other similar stuff. Now I know this parts sounds a bit stereotypical and I'm the one who is always thinking twice before drawing conclusions based on stereotypes, but wanted to mention it.

My parents are not the most open minded when it comes to LGBT people - I'm not out to them yet, so yeah...
My nephew's mother is even less open, and they are very very religious. His mother, after she found out about the cross-dressing from my parents, told my mother not to let my nephew wear my dresses anymore because "she didn't raise him to be gay"...

My parents think that he is like this because he was basically raised by two women (my cousin and her sister), so he lacks the "male model". Of course I think this sounds a bit off...

Anyway I was wondering if someone could relate, or have some input on this. It seems obvious to me that I'm the only one in our family who could actually help him if needed.

 

Thanks for the replies

The issue is (s)he is living in a pretty homophobic country and I guess even more transphobic... So almost certain that it wouldn't go too well to include the school and teachers in this. Also even if it would be, not sure if possible without her/his mom finding it out.

I don't live there anymore, so I'm not geographically close to him/her but I was thinking to be open and ready to be there (even if virtually only) for him/her when needed.

We were not so close because well, (s)he is/was a very hyper, energic and let's say a bit annoying kid and I'm more on the chill end of the energy spectrum. But (s)he lately seems to really like me and always asks about me when with my parents.

My mother at one point was talking about my nephew (it wasn't on my native language where there are no gender pronouns, yay ) with someone and she accidentally used the feminine gender pronoun when talking about her/him. It was so cool actually, she didn't notice and I was thinking this must be a sign or something :icon_bigg

I guess I also wanted to ask if you think this could be something else, or chances are high (s)he could be trans. Or it's not possible to tell only based on this maybe...