Why WebP does not work with Elementor
In some cases, you might not be able to see WebP images when using the tag method and Elementor as your page builder.
There are a few main reasons for this.
Elementor’s gallery module
If you use this a lot, it would be ideal to use rewrite rules method for delivering WebP (unless you use Cloudflare/CDN, as it would not work in that case).
When adding a content in Elementor, there is possibility to add thumbnails to sections. These are then moved to specific folder inside wp-content and Imagify will not optimize these by default. Hence there won’t be WebP images present for these as well.
The easiest way to check this is to check the source code of your pages and look for:
If you see this, make sure to go to Imagify Settings and add this folder as a custom folder so these images are getting optimized.
You might need to optimize the existing ones in order to apply optimization and WebP creation. You can do this via Media > Other Media