I mean there's also an Asmedia controller onboard. Make sure they are not connected to the Asmedia ports.
try also different other Intel SATA ports.
This board just has two Intel SATA ports, they are the gray ones. The blue ones are the asmedia ports. It seemed weird to me that the Intel ports weren't the blue ones, do despite what the manual says I tried the blue ports. On the blue ports, the SSDs did not show up at all so gray are definitely the right ports.
Also they DO show up on the IRST screen, it's just that CTRL-I doesn't work.