Converted from a basic disk to a dynamic drive in Boot Camp I got a MacBook Pro and installed Windows 10 using Boot Camp and all was fine. I then needed to create a 50GB NTFS partition, when Windows prompted me to convert to a dynamic disk, I mistakenly hit enter.

When I rebooted PC, the Mac option was gone. Could you please help me to restore my Mac partition and data?
Multiple people have hit the exact same issue that you described. As per Microsoft documentation, other operating systems like macOS and Linux do not understand Dynamic Disks.
Fortunately, what you did can be reverted. It's not straightforward, but it is 100% possible using the open-source utility named TestDisk. Do try it out -- there's some pain involved, but it will be worth the result.