>Squoosh lets you disable subsampling for JPEG and AVIF, but it can't be disabled for WebP, as the format doesn't support it. To work around this, the WebP encoder has a "sharp RGB to YUV" option which tries to limit the impact of subsampling at the cost of some colour bleeding. I used that option above.

This is something that I truly hate about WebP, thankfully AVIF exists and it's supported by all major browsers.