Hi.
If you already looked for one and couldn't find any, probably there isn't one yet.
Here a few suggestions:
-you can use the Theme Park module to create new icons, different and more visible. This module allows you to create custom icon packs, change individual app icons, and apply effects to your device's icons, offering a powerful way to personalize your phone's appearance without needing a separate launcher.
- you can download a theme for the icons from the app store, I have done that
-along with the theme icon you can enlarge the zoom on your phone or change the grid from settings to make the icon more visible.
I understand the utility of a widget, if you like you can go to Support Page and leave a feedback about this so that the Samsung Team will consider to make one.