How can I create a macOS bootable usb on Windows 10?

well there are plenty of free options out there so one wouldn't necessarily need to use the pay-to-use program you have suggested. I'm not entirely sure how this sort of "advertising" of a third party program is even allowed on here. Especially considering TrustPilot has a rating of only 2.6 for UltraDMG and that is most likely only even that high because of false reviews stating it works. They are proven to be disreputable in both their functionality as an app and for their customer service (or apparent lack thereof). As a matter of fact, I couldn't even type in the name of the company behind it into this comment as I got a warning stating that "So-and-So is not allowed...". I highly suspect that you are a shill for this company masquerading as a "satisfied customer".