Every image on this page is a normal WordPress block. On the static copy the files are copied next to the pages, so open both versions side by side.
Single image with responsive sizes
Check: inspect the image. The srcset lists several sizes, and each one loads from the static domain.
Image linked to its full size file
Check: clicking opens the original file on the static domain.
Lightbox
Check: clicking opens the WordPress lightbox, which runs on module scripts.
Gallery of six images
Check: JPG, PNG and WebP mixed. Every image opens in the lightbox.
Cover block with a background image
Cover block with a background image
Fixed background
Scroll past me: the background stays put
Check: this image is a CSS background in an inline style, not an img tag.
Background in custom HTML with a root relative URL
Check: the URL starts with /wp-content/ and has no domain at all.
Inline SVG
Large photo over 2 MB
Check: with “Inline images” ticked in the exporter, this one stays a separate file because of the 2 MB limit.