That is what a mother is really about. Loving, caring, nurturing. Is this something that is reserved for bio women only. Or if a bio man has the qualities does that make him a mother. No that makes him a father.
So if a trans person has the same qualities, does that make them a mother or father. Yes biological sex does not make one a mother or father. It is the qualities that make them a good parent.
Case in point the bio mother sold the child twice. Giving birth does not make one a Mom, a mother yes, but not a Mom. A Mom, or Dad has the qualities mentioned.
IMHO
Mistress Janet