Hello @creativethemeshq,
Thank you for the response! I had been using this plugin to upload the WebP images: https://br.www.ads-software.com/plugins/wp-enable-webp/
Now, after changing all WebP pictures into JPEGs and PNGs, I still get some stretching on mobile, in fact the stretching seems to be happening once the client selects the variation of the product and hits the button to add to cart.
I’m going to try this plugin you recommended, thank you!