1. Moto G5 Plus
2. Arrow-OS (Pie)
3. I'm pretty sure I've used Hi-Res Output in this device before. I don't know where it went, it could be the ROM's fault maybe. Build 816. It only shows up for USB and Bluetooth.
If I recall it uses a WCD9330... I'm not sure.
audio_policy.conf https://pastebin.com/Xu6HMM0p