Perspective question

So I’m thinking about if I were to have kids someday, and they came out as transgender and showed signs and/or communicated wanting to transition as a young prepubescent kid

Has there been research done to show the effects of starting hormone therapy that young in a person?

Not only would I accept this about this random soul that the universe would give me to nurture, but I would affirm their feelings and invite conversations and exploration about what their feelings meant.

I just know of families that have allowed their children to undergo hormone therapy, but I’m wondering if from a scientific perspective if this is objectively healthy for the developing kid

As a cisgendered person, I don’t know first hand how important this could be to someone. I’d like to think that emotional affirmation, and as a parent I could validate my kids gender identity while protecting the health of the physical body they were born with until they reach maturity physically.

And I’m open to any underlying misinformation that could be in this concept or ignorance in this question… educate me!!!