There are some inconsistencies between regular symbolic icons and high contrast ones
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Regular:
High contrast
The handle is smaller:
Home, Documents, Downloads, Pictures, Videos and Trash
Regular:
High contrast
Home is smaller, paper doesn't have rounded corners, arrow lacks the bottom line, Pictures folder icon is a camera, Videos folder icon is not outline-based:
Additional info
GNOME 42 beta
I'll edit this if I find more.