They work:

But sadly the progress bars are not theme-able like the notification badges are. I'll open a separate issue for this

is there a possibility of getting the progress bars to work on other distros as well? Or does this rely on some heavy in-house modification of gnome-shell done by canonical?

They work? Really? I am also having a problem with this on 18.04. Vanilla install doesn't even have them.

Also tried manually installing dash-to-dock v63, which should have this feature, and it doesn't. Xorg or Wayland, same problem.

I think the problem is that not every app suports it.

So far badges are only supported by Geary and Telegram 🤷‍♂️
I believe thunderbird used to support them a while back but I think they maybe miss something now

To clarify, the support is typically only on Ubuntu (and it should work out of the box) and from those applications that have been patched to support the specific dbus protocola developed by the Ubuntu people.

Thats sucks fuck you canonical for not explaining there source code and help contribute to upstream GNU/Linux

Thats sucks fuck you canonical for not explaining there source code and help contribute to upstream GNU/Linux

The API are documented here: https://wiki.ubuntu.com/Unity/LauncherAPI. To use the API there is no need to use libunity, you can use directly dbus and it should work.

It would be nice to have a generic API (something under the freedesktop domain) but to my knowledge there is nothing like that atm.