Apple TV to HDMI splitter to an HDMI to component adapter to the mixer and then to the receiver. I wish either the Apple TV or monitor had an audio output. That box from Amazon that #%^* USPS didn’t deliver today was supposed to solve this mess - 4x2 matrix HDMI switchbox with audio output.
I guess I could have hooked up to the 26" TV in the room but that would actually be a step down in resolution and difficult to see (it’s tucked away in a corner). I might as well move that one upstairs since I haven’t used in it ages here in the home office. And then that leaves the 40" that I bought for the bedroom as surplus.