Looking for support or purchasing advice with Apple’s Home app, accessories, networking troubles / solutions, anything else HomeKit supports, or which brand or accessory to buy — try asking here.
Try to keep your question as clear and concise as possible because more people will be able to respond.
Here is a list of HomeKit enabled devices on Apple’s website.
When you have the remote on screen use the device volume rocker on the side of the device.
Right, but your TV has to support HDMI-CEC with volume change support