macOS 10.13's Disk Utility 17.0 (1626) does not recognize unformatted disks unless you click View > Show All Devices, quit Disk Utility, then relaunch it. But Diskutil does recognize the drive. You use it to perform a quick, cursory format (e.g., diskutil eraseDisk JHFS+ NewDisk GPT disk0) to make the disk appear in Disk Utility. The link below found on internet.

https://tinyapps.org/blog/mac/201710010700_high_sierra_disk_utility.html