How long is you ‘cable management’ now?” I am unsure what that question means.
I mean, any HDMI extension cables or HDMI splitters that may mess with EDID?
As said, the RT2xPro checks if EDID was successfully received and only then checks for HDMI compliance.
If any of the two was unsuccessful it will fallback to HDMI WITH audio, so you should hear audio in any case.
Something in your setup successfully sends EDID with non-compliant HDMI EDID (DVI Only).
Your TV has to be at least in standby (not completely powered off from outlet) for the RT2xPro to properly read EDID.
As for image quality, upgrade your setup to full SCART RGB.
Use RGB2Comp+RT2xPro from RetroTink, or OSSC.