Yes. I mentioned that Heroku also supports them.

There’s a difference between classic “buildpacks” and “cloud native buildpacks” today you cannot use “cloud native buildpacks” on Heroku, but you can sign up for our pilot platform called Fir that will support them.

The “classic” buildpacks cannot natively produce docker images but CNBs can https://devcenter.heroku.com/articles/buildpacks.