Can a girl get pregnant through her butt?

NO. Egg present in fallopian tubes near womb at the end of Vaginal sheath

need sperm to form zygote and get pregnenet. The sperm injected by male

into butt is wasted reaches potty stand expelled while using wash room.

So if u want to make girl pregnanat use her reproducting private part

that is vaginal opening to inject male sperm