WebKit is used by the WebkitGtk library which all of these include.
But it's been stagnating for years and it's still not a viable replacement for Gecko and Chromium (broken scrolling on scaled screens, WebAuthn is unsupported so I can't login to my email account, etc.)
In any case, if I recall correctly Eich's comment, the biggest difficulty was building webkit for Windows. The documentation was very out of dated, and it's understandable given Apple's focus on its OS. Even this GitHub says it's a web engine for "macOS, iOS and Linux".
But it's been stagnating for years and it's still not a viable replacement for Gecko and Chromium (broken scrolling on scaled screens, WebAuthn is unsupported so I can't login to my email account, etc.)
In any case, if I recall correctly Eich's comment, the biggest difficulty was building webkit for Windows. The documentation was very out of dated, and it's understandable given Apple's focus on its OS. Even this GitHub says it's a web engine for "macOS, iOS and Linux".