I’ve been playing a bit more with these buses.
If you have a bus with named members, then you can right click on the bus, and choose “Unfold from Bus” and select a name from the list, and I think this is new in KiCad V6.
I’ve also added some aliases to my example, and grouped them under the name “BBUUSS”. And these aliases can be used as a separate bus, or as a part in a group bus.
Note the: Music.Gretl name.
The example is just two instances of a hierarchical sheet, connected on the root sheet, but with the Truck and BUS signals cross-linked. The example is free from ERC violations.
2022-07-06_asdf_hierarchical.zip (13.6 KB)