if the non or pre-op trans-woman still produces semen, of course it can be used to impregnate a genetic woman.

Sylvia Rivera, a trans woman of colour.

No, Futanari is Japanese and means hermaphrodite, they are females with a dick. While a shemale is a derogative term for a trans woman (male-to-female). Trans woman in Japan are called newhalf (nyūhāfu).

The more socially acceptable term is trans woman or MtF. Or just a woman

A post-op trans woman is a transgender woman who has undergone gender-affirming surgery, such as vaginoplasty, to align her physical characteristics with her gender identity.