Could be that just the icons are AI generated

This is entirely possible. Could also be the whole image is ai generated, but the maker manually inserted the text (not so hard to erase the text ai would have generated) because AI messed up. You can for example first ask chatgpt to generate a text, but if you than ask it to generate an image with that text it will be all wobly and full of errors because of how the generation process works.

an AI upscaler/enhancer to sharpen the image.

There is no automatic fix of the first problem, because the ai spits out shapes that look like letters but aren't.