By default, empty drives are hidden in Windows 10 File Explorer.
If you want to show them, then here are the steps:
Click on File > Change folder and search options.
In the pop-up, navigate to the View tab.
Click the Ok button at the bottom.
That’s all. You can now see the empty drives in File Explorer.
If you want to get back to default, then follow the above steps and instead of unchecking, check.