In reply to Mike Johnston.

Hey Mike,

Liam here, one of the ACF devs. I've been the one from our team following along with the core PRs and tickets for this feature and working to get support baked into ACF.

I published a demo plugin which shows roughly how this kind of integration will work with ACF once we ship it here if you want to try it out: https://github.com/lgladdy/acf-block-bindings

I think that until there's a UI for the feature, the usage will be limited, but do expect to have something shipped in ACF well before the UI ships for those folks who want to do manual connections!