These are just a recolor of one of her expressions that exists by default, if you adjust the blendshapes you can set these as her default eyes and just recolor them.

Screenshot 2024-04-06 213345.png
The option looks like this and its located under eyes.

If you don't know how to use blendshapes:
Click on the avatars head
Look on the right side and find the option labeled "Blendshapes"
Drop down the menu
Scroll until you find the option I put and slide the option to 100