Reinstall macOS Mojave on MacBook Pro with Windows installed
Is it possible and very simple to reinstall macOS Mojave on your MacBook Pro. An easy approach would be to perform the Internet recovery. Using Internet recovery, your MacBook Pro connects to Apple's servers, and download and install macOS over the Internet.

To learn more about installing macOS via Internet Recovery, you can follow the instructions in the Apple Support document:


How to reinstall macOS from macOS Recovery