From my understanding :
⋅ you still have SecureBoot enabled.
Another cause of disc not showing :
⋅ Intel Optane or RST → look for Sata Mode in your bios, it should be on AHCI, not RST.
Sorry for the word « wipe » it was my translation mistake, I was thinking delete or erase. Now it’s done so… not bad after all 
My sources are in french, but advices are often :
⋅ in bios disable FastBoot
⋅ in bios disable SecureBoot
⋅ in Windows ( not your case ) disable Fast Startup
⋅ in Windows ( not your case ) use Intel tools to disable Intel Optane
⋅ in bios set Sata mode to AHCI