I have seen that riser shoot 1100+ on a 70m 1440 and some very good indoor scores too. That riser is not likely holding anyone back. In fact changing to a stiffer/heavier riser with a different grip could take things the wrong way.
Ideally, she would try every bow in the price range you have in mind. Some dealers will demo for you. Some club mates will let you try their stuff (I have a 25” Xceed near Edinburgh…). Then she can pick what she likes. Some folks like “dull” heavily damped riser feel (Carbon W&W) others like a higher frequency feel (
Hoyt)
If there is a mental issue that the riser is not up to making progress - which is a real thing - pick a known manufacturer (like W&W,
Hoyt, Spig) and let her choose the bow in the colour she likes best. There are few bad bows - just different feels. How it looks is a major factor.
On the weight front, my 15 year old who is now 5’8”, has been shooting a
Hoyt Elan for 3 or 4 years. She shoots rarely, just for fun (riser was her mothers from back in the day) and weight has never been an issue. The Elan is around 1200g. Grip is actually a bigger issue for youngsters, we found the older
Hoyt grip too rounded and too big for small paws - so it has an ancient Yamaha grip modded on. Newer
Hoyt grips are better and easier to mod.
If you want 23” I’d look at the W&W Winex.
Let her pick.
Stretch