YOUR NEXT STEP
A missing drive can involve a cable, enclosure, power, controller, or the drive itself. One Disk Utility result does not prove it needs a clean-room service.
Check the connection, power, and drive path.
A photo of the exact error or a recording you already have may help. Do not power a noisy or failing drive back on just to record it; protect the files first. You can attach it to your message below. Sharing is optional; you do not have to disassemble anything or repeat a risky test.
A symptom can have more than one cause. These guides help you choose a next step; confirming a hardware fault requires testing.