While re-installing my home lab I found something.
I use a homelab with Intel NUC NUC7I7BNH
I use PNY FDI32GEXFITK-EF as boot disk for Intel NUCs. (3 keys – one for each NUC)
I use PNY UCD10 USB Type-C 3.0 / Type A USB 3.0 64GB as ESXi 6.7u1 installer disk
When I boot the Nuc with USB keys plugged we can see all devices but when installing I see this :
We can see that one key is not shown – I though this was a problem with my key so I tested others with same results (I had three identical keys – each for each NUC).