In the first flag the triangle is taken from the progress pride flag, as the black and brown stripes represent PoC on that flag, and the base flag is a trace flag.
In the second I went with the green, white for the transblack community as a whole, including mixed transblack, cisblack transblack, and other transblack identities. And the brown and peach stripes represent the diversity of the transblack community, and a connection to the black race.