I ran into this on my Lenovo ThinkCentre M92p: I was only able to boot to UEFI entries labelled "Windows Boot Manager" or "Fedora Linux".

I found that installing the latest bios update from
https://support.lenovo.com/us/en/downloads/ds029265-flash-bios-update-thinkcentre-edge-92-thinkcentre-m82-m92-and-m92p-thinkstation-e31 (as of 2022-04-07, that's version 9SKT9CA released on 2018-12-23) made this stupidity go away, and I could boot from entries regardless of their label.