what apps do you use to add to themes you have downloaded?

just got the Fold 8 and I'm loving it for the most part. I downloaded a cute theme from Samsung, but not all of the apps have an icon and I don't want to put a yellow lemon8 app on my purple home screen. What apps are you all using to customize that aren't super expensive? #phoneupgrades #phonemakeover #iphonetosamsung #galaxyfold8