The homogenization of these icons has been a long source of consternation for me.
They're barely functional as icons; you can scroll right by them and miss them; which makes finding the apps in a list of apps a bit annoying sometimes. Removing each icon's unique color scheme and replacing it with the 'company 4 colors' was the stupidest fucking idea ever.
Even more infuriating is how they keep renaming the applications to unexpected things every so often; so they move around; and it's dreadfully annoying to remember if they prefixed the name of the app with a G or something else completely different, which renders strict alphabetical sorting a bit moot.
It can get even worse. My phone lets me do this to my icons which is ridiculous. I think this was opt-in but now that I'm going through my settings again I can't actually figure out how to turn it off lol
This is Material You icons; and this is basically not something you can opt out of...that I know of. You may want to find a different Launcher that allows you to load icon packs or disable that Material You behavior. (If yours doesn't)