Websites serve images as WEBP because they load faster, so that's what your browser saves. Then the trouble starts: older Photoshop versions, many editors, upload forms and print services expect JPG or PNG.
Drop the WEBP files above and they become JPGs right in your browser, with nothing uploaded. Transparent areas turn white, because JPG has no transparency; pick PNG if you need to keep it.
For animated WEBP, the JPG gets the first frame. To keep the animation, convert it to GIF or MP4 instead.