Bunny Optimizer
Images
Bunny Optimizer resizes and re-encodes at the edge, from query parameters on the image's own URL.

Look at this image's srcset. Each entry is the same file with a different width, and nothing was resized while the site was built.
Modern formats

Without the component
Optimizer works on any URL the pull zone serves, so a plain <img> can use it too:

<img src="/square.png?width=320&format=webp&quality=80" />Turn it on first
Bunny Optimizer is a paid pull zone feature, so the adapter never enables it for you. Without it the parameters are ignored, and the original image is served.