We’ll see, we’re not obliged to always make it generic; sometimes a custom one for a device type can be good too!
Typically Home Assistant has components like that (the one on the right for heating):
It could be a custom box in Gladys, or we could select a list of heating-type devices to control those devices in a single box, without it necessarily being an object group management.
Anyway, in any case, the first step is the two components you propose @jgcb00. This kind of component is a layer on top to provide a UX that’s as practical to use on a daily basis 