Can you turn Apple TV on without native remote? Sure you can! Just take a look on this article.
Apple TV doesn't respond
If Apple TV is plugged in power supply, then it is always on. But after a period of inactivity, it automatically enters Sleep (Standby) mode. You can use CiderTV to wake it up from Sleep mode.
Wake Apple TV from Sleep mode
To wake your Apple TV up from CiderTV just press on this Apple TV name or try to send any command (just swipe a couple of times on the control screen). Your Apple TV device will respond quickly.
To prevent turning it off, you can set your Apple TV never go to Standby mode.
Prevent Apple TV from going to sleep
After one hour of inactivity the Apple TV will sleep by default. To change your preferences for Sleep mode, go to Settings → General → Sleep after and set to Never. This works 2nd, 3rd and 4th generation Apple TVs.