Vvc is h266, the spec is ready it’s just not in a lot of hardware, or even decent software yet, that often takes a few years.

Av1 isn’t much better than hevc (h265), it’s just open and patent free and Google is pushing it like crazy.

It has iirc 1 major feature over hevc, non-square subpictures, beyond that it has some extensions for animation and slideshows basically.