Why can’t I assign entities to a device?
In my case, I have a Tuya IR bridge. Here, I created manually a remote. Each button appears in HA as an independent entity, not assigned to any device.
I wish, it would be possible to assign them all under one device (created by an helper).
you can look at it from a bigger perspective, that your heating-system is a function which consist of the device and some independent entities - but should be presented in a view as “one function”
See this WTH, what if you could have Labeled the device and independent entities/automations and view them filtered like you can for devices/entities/automations linked to an Area: