Well, I got the Apple 4K TV. I also purchased an Orei 4K 60Hz 18G HDMI 2.0 Audio Converter Extractor ARC Support - SPDIF + 3.5mm Output - HDCP 2.2 - Dolby Digital/DTS Passthrough CEC, HDR, Dolby Vision, HDR10 Support (HDA-925). I tried plugging in the converter and I didn't get a picture or sound, or I got crackles for sound. So, I decided to plug Apple TV in straight to the A/V since the wire was there and it worked. I am getting 1080p picture and PCM 7.1 sound.
I don't know if the converter extractor needed to be plugged into my 4K HDMI on my TV for it to work(because I didn't do that), but I am perplexed why sound didn't come out at all(or just static). I don't know if there was anything else to set up in the Converter, but there weren't any other switches or instructions. Anyways, I returned the extractor and I am going to go with the 1080p picture and PCM 7.1(which sounds better than whatever I had previously).
Thanks for all the help. I am considering a new A/V receiver when HDMI 2.1 comes around in the next year or so, which will solve these issues. The Apple 4k TV is pretty cool over the 1st or second generation I had.