Hi,
Please check this topic, this is happen with original AMP too -> https://wordpress.org/support/topic/google-search-console-image-size-smaller-than-recommended-size/
Thank you for message!
Hi,
Please notice that’s not a problem which comes from our theme, sorry! Please keep in mind that AMP is a built-in plugin which was optimized and integrate into our theme according to the official requirements so far. It would be preferable that you use large images on your site to get the best results. More recently, it seems that Google has put these warnings for the images which are less than 1200 pixels wide (likewise, the height of portrait images should be at least 1200 pixels). The best solution, in this case, would be to manually replace your old image with another one which has minimum 1200px wide, sorry! For more information about this case, you can check the topic that @Eric V mentioned above -> https://tehnoblog.org/how-to-fix-google-search-console-amp-image-size-smaller-than-recommended-in-wordpress/ because this aspect has also been discussed here.
Thanks for your understanding!
