She is a Unisex EUNCH ! why keep saying Transgendered. As when she was born they found out she is a Kinner. The only way is them knowing the moment she is born is her having two parts which is EUNCH-Unisex.
Hindi needs another word for Kinner. Also its been 20 years does she never have a shower or read sex education books. And see her body is different. Many Eunch look like women so thats not the problem.
They can also make her have a surgery to later on as this love is not going nowhere lets keep it realistic. Hugging and looking each other is not what a male wants .
I also recommend people to watch PHIRKI a Bengali version and much more realitic interns of trans which are actually real trans in the show but again are portrayed as EUNCH
Its 2020 13 year olds know about body parts Soumya and Heer should know from their body parts how they look and what they are you can really hide from the internet and friends talking about stuff