How to include my denon receivers and sony songpal receiver in automations

Configuration
1

i’m probaby missing something simple but when I select one of my receivers as the device in the “actions” center of an automation, I can’t see any actions in the dropdown below the device. Normally with a light or fan I can see options to turn them on or off. With the receivers I can’t. Is there someway to fix this or get around it? For example, I want to create an automation or script that will turn all of my receivers on or off at the same time.

2

Select “Call Service” and then the services are listed here Media Player - Home Assistant

3

thank you!