Can I use Apple TV for music via AirPlay without turning on my TV?

I have an apple TV 4K connected to my Onkyo tx-NR5100 which is connected to my TV via HDMI (eARC port which supports CEC).

Everything works great except for 1 thing: I use an iPad to play music via Apple Music on the Apple TV since that device can play both lossless and Atmos and I can control it through the iPad (which is great). It's the only combo I managed to get to work to play Atmos and do remote control via another device (iPad/iPhone) not unlike spotify connect or tidal connect.

Here's my issue: when I select the Apple TV via airplay to play music, the TV gets switched on. I don't really need the big screen at all but I suspect the Apple TV gets out of suspend causing the TV to switch on which is a massive power waste.

Anyone any idea how to, when only playing music, prevent the TV from being switched on?

Many thanks!

Herman

[Re-Titled by Moderator]