I don’t know what a .webp file is but I don’t like it. They’re like a filthy prank version of the image/gif you’re looking for. They make you jump through all these hoops to find the original versions of the files that you can actually do anything with.
Edit: honestly I assumed it had something to do with Google protecting themselves from image piracy shit
FWIW I use Photoshop 2023 to convert webp images to other formats occasionally. My Mac has no issues viewing them but I think my windows 10 desktop has issues. Pretty much all browsers support it though.