Volume Control - Bravia (Android) TV

I am the newest of newbies with HA. I’ve installed it and added a bunch of devices from around the house. I thought I’d start with a simple automation - turn the TV volume down at 10:30, when my wife goes to bed.

Am I completely missing something in the GUI, or do I need to edit YAML directly? In the Automation screen all I see under “device” is the TV and options to turn it on and off, and restart it. I know the capability exists because I can do it from the dashboard as long as it is turned on first. In addition to the Bravia device, I added the generic Android TV Remote device but didn’t see anything there for volume, either.

Apologies in advance if this is a stupid or redundant question.

RESOLVED

I can’t believe I struggled for a day before posting, then stumbled on the (an) answer 5 minutes later.

For anyone else as dumb as I am, instead of selecting “devices” for the action, select “media player”, then “set volume” in the resulting right pane. You then add the TV [entity] as your “target” there.