I am using a Macbook Air. After I installed Windows 10, I wanted to resize the Windows Partition and create a new partition to use data.

After that, Windows informs me that a recovery error - cannot boot to Windows. And I reinstall Windows again.

Then after I can enter to Windows desktop, bootcamp informs me that "could not locate macOS volume"

Then I get this error.

The option to boot to macOS has disappeared, only Windows remains.

Then I use DiskUtil to check. The macOS volume partition type is marked as "unknown".