Yes, but you cannot create a bootable macOS USB from Windows easily. You would need a tool like TransMac (paid) and risk malware. Instead, use a friend’s Mac to generate the DMG.
For those who need a genuine .pkg or .dmg payload for deployment: Mac Os Catalina 10.15 7 Dmg Download
The downloaded file from the Mac App Store or Apple's Support Website will be a .pkg file, not a .dmg file. However, you can create a bootable installer using the createinstallmedia command in Terminal. Yes, but you cannot create a bootable macOS