bundles discovery and clones

I have recently been playing with git clone --bundle-uri and loving it
because I can clone with almost-*zero* resources being used on the
server!

I am a little confused by https://git-scm.com/docs/bundle-uri
mentioning "discovery" and things. Is this something being added to
the git cli, a special feature for other clients, or is it still too
early-days to talk about much?

I would love to produce bundles of common use cases and have them
auto-discovered by git clone *without* the --bundle-uri parameter, and
then let our CDN do the heavy lifting of satisfying things like:
git clone
git clone --depth=0
git clone --single-branch --branch main

I'm not sure I hold out as much hope for pre-bundling pulls/updates
but any movement towards offloading our big-ish repos to CDNs is a win
for us.

Thanks,
Matt