I've tried to share images and occasionally, I'll get an error. I'll open the image in a web browser and notice it's webp. I'll then have to convert it via a website to jpg or whatever. Is it possible to do this in app? Force webp into jpg so I can share it?
I have a vague recollection that inkscape maybe able to handle webp conversion... the alternative could be to display it and take a screenshot that you can save any way you want.
Edit: scratch that it can't... I used cloudconvert.com the last time I did that.
On PC there's Paint.NET that natively supports WebP. Other than that I think there's a small module in PowerToys to easily convert an image to another format from a right-click or something.