I like the Vortex 2-7x32 with a EGW extended base
https://www.egwguns.com/scope-mounts-rings/ bases and Weaver quad lock high 1 inch extended rings
https://www.amazon.com/Weaver-1-Inch-Extension-Detachable-Rings/dp/B000U6AG3A?th=1I have not found anything I could not get mounted with this combo
it is important to understand that to get consistent cheek weld you need to Turkey neck and drop this means extend the neck as far forward as you can without straining and drop
the other thing is LOP place the but of the rifle in her bent elbow , she should just be able to place the pad of her index finger on the trigger if she is short you may very well need to get the stock cut down to her proper length of pull.
getting far enough back is never my issue as I am tall with a 14 inch length of pull
getting the rifle fit for her , proper length of pull and proper turkey neck and drop cheek weld , with proper eye relief
when you go to mount the scope a bit of painters tape on the scope with the top of the rings off have her get down in prone turn the magnification to highest and with a good cheek weld find were she can see clear edge to edge she stays put you move the scope back and forth till it is right mark the tape with a pencil where the ring lines up
then standing with good cheek weld and lowest power find were she has a clear image edge to edge mark the tape with the pencil
your hoping that both of these can be the same place but sometimes you need to split the difference for mounting
you may very well have to raise her cheek off the stock with a spacer , card board and painters tape or yoga mat and horse wrap tape till she with good cheek weld can see strait through the scope no shadow on the edges. you can find a nicer looking way to get her proper comb height later you just need to find the correct height . make sure she closes here eyes takes a few breaths to relax then opens them and without moving decided is she can see clearly edge to edge.
here is a picture of one of my rifles I use sleeping pad and horse wrap with hocky tape over the top to lock it all in , on another rifle I have a Hornady cheek pad
https://www.opticsplanet.com/hornady-gun-cheek-piece.html it has storage for ammunition also it is nice that rifle is ready to walk out the door with , mag and spare ammo stored in the cheek pad with storage on stock any time I need it