Great that you have a good relationship with your parents, but you have admitted that you are young, so you might not be in the best place to hand out parenting advice on a parenting forum - esp. as you have a biased interest...
Yes, one of the jobs of a parent is to understand their child, to nurture who they are and to help them develop to become the best shape 'Tommy' / 'Jane' / etc. they can - i.e to help them blossom into being themselves - not imposing the parental view only...
However, the job of a parent is also to protect and nurture the child - to help signpost and show them the road ahead - it is not to back off, accept anything the child tells them and affirm what is influenced mainly by peer pressure and social media, especially when so wrong.
All people are born male / female and can not change sex ever - regardless of what they are told by others. This means that the parent's job is to help them become 'their shape of boy or girl' not to believe that because they don't fit in entirely with a narrow societal definition they can somehow change - that is to tell them / affirm them in / propagate a lie - it is only to support them in a pathway which can never fully satisfy because it starts with lies and the only development can be an increasing understanding that they have been sold short.
So when a boy express himself in a 'feminine' way - is more sensitive, cries more easily, is nurturing and likes dolls - the answer is neither:
- be a boy, here is a gun to play with / man up / etc.
- nor, oh you must be a girl, here are some drugs and let's chop off your bits...
The answer is to affirm that the child can be a sensitive boy, can look at nurturing careers and that it is okay to cry / dislike football / etc. - i.e. help them develop their sense of who they are as a boy...
Similarly with girls who are tomboys / want to play rugby or be in the military or do a science job, be a truck driver or builder - great, support them in that and affirm the type of girl they are and the woman they will become - but don't tell them lie and say that you are a boy, here is a binder and some surgery...
When you see influences taking your child away from that true affirmation into a corrupted web of deceit and belief that they are somehow something they are not and can never be - when you see suggestions of living that lie with changes in pronouns and then medication and surgery - it is the parent's job to say that this is harmful for my child - this is a safeguarding issue and child abuse from those supporting / promoting it - I will not stand by as a parent and allow this to take place...
The very concept that the child knows best and should be affirmed regardless is a very modern view from your generation - generation which often wants whatever it wants without understanding responsibility, or counting costs.