at config/devices/dashboard
I had opened this FR: Add Category to Devices panel · home-assistant/frontend · Discussion #20464 · GitHub in the Frontend discussion, but Frenck explained this is not (yet?) in the backend, so please see this feature request to add Category to the Devices dashboard.
Explcitly no to use in the backend logic, for which labels are perfect, but truly only for categorizing the view/listing of devices, as currently it is a bit of a mx between true hardware devices, software (HACS) and Services.
It would be ok for me if those 3 were built in by default, but I could imagine other users want to use their own naming
Anyways, hope you will consider thx.