Ok here is what I found. I have a Denon S540 receiver connected to the ARC HDMI on a Samsung Q6 tv. If the last tv source I use is through the Denon receiver (for instance: a Firestick connected to the Media Player HDMI port on the receiver) and I turn it off, it "will not" turn on the next time I turn on my tv. If the last tv source that I use is not connected through the Denon receiver, (for instance: Directv connected to the HDMI 2 port of the tv or Netflix app on the tv) when I turn the tv off, then the receiver "will" turn on the next time I turn on the tv. So my solution was to use the tv's HDMI inputs for my Firestick, Xbox and Directv. The audio on all the sources including tv apps still runs through the Denon receiver (ARC).
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