How to automate Elfin power On/off

I just bought an XGIMI Elfin, and I'd like to use it for digital decorations in my window. I've used some older projectors in the past and they've always had an auto-power on option, when they get plugged in. I hooked my old projectors up to a smart plug, and they would turn on when the smart plug fired up.

As far as I can tell the Elfin does not have a similar function. I've also tried creating a routine for it using my Google Home app, and although I can change it's volume, I can not get it to power on or off. (Even though it's an option on the app) I also can't seem to get it to power on when it receives an HDMI signal. Does anybody have any ideas for a workaround that might allow me to get this to work?