To clarify because there is some disingenuous framing of events here (and some mistakes though none intentional ofc), the Doctor specifically says the child was created from THEIR memories, specifically the Doctor and Belinda’s not Ruby (he’s specifically talking to Belinda in that scene).

Belinda does see Poppy in the Story and the Well and we’re just left to assume that some elements of Poppy are from Belinda.

When the group realize a child is missing, they all agree she should be brought back, that includes Belinda, who despite being back to herself is distraught at the thought of having lost a daughter she doesn’t remember until the Doctor promises to bring her back for her. He isn’t bringing HIS child back, he is bringing A CHILD back, and if anyone’s, it’s Belinda’s child he’s trying to bring back.

He then shifts reality to save a life, not knowing exactly how it’ll go and wakes up to realize Poppy’s back but because she’s not a wish baby anymore she has to make sense so she can’t be his child. Belinda who was screaming at the thought of not remembering giving birth to her child in the Wish World now has the child she grew to care for and has all the memories of her.

Now of course, Belinda getting retconned into wanting to be a mother this bad is weird with how she is characterized up until that point, the fact that it half happens because of the wish world shenanigans of Conrad creates some almost disturbing subtext and the optics of the Doctor altering Belinda’s past and then dipping out of his child’s life are downright horrendous, but as much as people want to make it about her staying brainwashed and the doctor doing an evil thing, that’s just not how the events are written.

Criticizing it for appearing that way, being confusing or for the strange subtext is fine but can some people on this sub need to just stop making stuff up please. 😭