u/External-Knee6378

Hello! I am having difficult getting this piece to export properly. I've never had this issue before but every time I export it as a png, it loses all of the detail in the highlights and seems flat. I've ensured that the "save background color" and "save color profile" options are unchecked. Any help is appreciated! Left image is in gimp, right is the exported version in Preview. It appears like the latter in all other viewers that I've tried. Thanks!