Not only does Webkit support Wayland, but WPE Webkit was one of the first apps to get ported, and its basically the poster child for Wayland:

https://wpewebkit.org/about/faq.html

That said this is not upstream Webkit (but they do try to keep up to date, its just they usually lag due to the customizations they did), but a more cut down version of it that supports a bunch of build config flags, and is used by a ton of embedded devices.

It's a fairly significantly more lightweight option to Chrome/CEF, that does suffer from a somewhat worse DX and compat with web content, but if you can tailor your content to it, rather than looking for a flawless ootb experience, it's a worthwhile choice.