In previous years we had hass, and we could just come with ssh on the SD card (Raspberry) Unfortunately nowadays Hassio that admittedly is somewhat slicker but unfortunately you can not get to the command interface anymore. There is a ssh plugin “OPENSSH” but that does not include regular installation commands such as sudo and curl -fsSL https://download.docker.com/linux/raspbian/gpg | sudo apt-key add -
How can you install another app such as HomeBridge in addition to HomeAssistant? In addition, I always had Midnight Commander on it.
Can‘t give you a general answer, but you don‘t need to install homebridge any longer, HomeKit is natively supported by HA.
I need the opposite > hardware from HA into Apple Home