How can I make a macOS Mojave bootable USB installer in Windows 10?
It is generally not possible to create a macOS bootable installer using Windows or Linux computer.
You can consider installing macOS via Internet Recovery.
There is no way to create Mojave USB installer on Windows with the app installer downloaded from Mac App Store. You have to download Mojave dmg file and burn it to USB. Unfortunately, there are only two Windows app that works in this way. One is TransMac and the other is UUByte DMG editor.
For those, who failed with TransMac, UUByte DMG Editor is good to go. The steps are much simpler than TransMac. Simply load the dmg file into the program, choose the USB for burning and finally start the burning process. It will be done within 10 minutes on an USB 3.0 drive.
Full tutorial is covered in here: How to Create macOS Mojave Bootable USB on PC