In case you're wondering, the plastic IO cover/shroud is removable on the GIGABYTE GA-AX370-Gaming K7 (and probably also on the gaming 5). This is what's beneath. : r/Amd
illuminated io shield - Edge Up
How to Make Your Own Custom I/O Shield - YouTube
Generic ATX Motherboard Back IO Vented Shield Back Panel Plate Cover - MODDIY
intgrated IO shield - Edge Up
Supermicro MCP-260-00067-0N IO Shield For Motherboard and 2U+ Chassis