A group of three Thai teens or younger women are laughing together. Two of them hold small rainbow flags. At least one (per the original photo caption) is trans.

There is a distinct lack of resources here, especially since i'm leaving out postings in Quora and Reddit, as well as porn videos and anything from the virulently queer- and trans-antagonistic Focus on the Family.

While the relationships between stepparents and stepchildren can be complicated, there are relevant suggestions in the section for parents.

For resources related specifically to stepparent'ing queer or trans tweens or teens, check with local LGBTQA+/SGL organization(s) or, possibly more helpfully, local queer- or trans-friendly therapists.

If you know of other relevant resources that i've missed, please let me know.

Two Muslims who present as girls or young women stand at the bottom of some stairs. The one on the left is wearing hijab and is holding a sign that reads, "SUPPORT MUSLIM TRANS YOUTH!" The other has darker skin and holds a rainbow flag.
This image comes from the "What do you think about LGBT people as a Muslim?" thread on Quora.