She's explored a number of distant planets and planes looking for some magic that could solve her problem...

Ultimately it all mostly proved a dead end.  But perhaps one planet could provide one of the key pieces she needed for another plan.  She needs a soul with a certain sort of malleability, that has previously undergone the right sort of transition.  With enough of the appropriate oils, she could brute force it, repeating reincarnations on an otherwise suitable subject.  But this planet likely already has someone suitable, and they will likely have a bit of useful magic to start with, which will ultimately become her child's if everything lines up.  (She hasn't worked out how to guarantee everything lines up, but she's pulled off wilder plans with less preparation and she believes she can figure something out as her planned scenarios progress.)

So, from a secure demiplane adjacent to the planet, underneath both a Mage's Private Sanctum and a Mind Blank, she casts Greater Scrying, with a ritual to modify it to search for a suitable subject (according to a variety of parameters, some obvious, some subtle, and some downright esoteric) instead of scrying for someone by name and face.  She also has a technique such that her Mind Blank will cover the resulting scrying sensor.  She wouldn't want to spook her raw material.

What does she see...