I think it’s time to increase the icon resolution for tablet phone like Z Fold. The upscaling algorithm doesn’t work well, as result icons look fuzzy on Z Fold 3. It’s not a good 1st impression for a flagship device.
Note, degradation of icon is much more noticeable only with Galaxy Themes. The icons from default theme in Z Fold 3 don’t suffer from the same degradation.
1: 1 Scale screenshot from each display.