During a new install of version 6.9 from both "install" and "miniroot" img files, it completes the install successfully but does not create a UEFI boot entry. All partitions appear to be created properly regardless of disklabel option chosen, as I can boot to it using a Linux distribution UEFI live install disc boot menu, and the issue can be fixed by booting said live install disc and creating an entry using efibootmgr. The motherboard I am using is the following (if that is a factor):
https://www.asrock.com/mb/AMD/Fatal1ty%20990FX%20Killer3.1/ Thanks, Nik Reist