At this time you won't be able to do so. Apparently Apple is exercising its discretion as noted below.
See Two-factor authentication for Apple ID https://support.apple.com/en-us/HT204915 See this section especially Setup two-factor authentication for your Apple ID. From this section, "Two-factor authentication is available for Apple ID accounts with at least one device that's using the latest iOS, iPadOS, or macOS. Learn more. You can follow these steps on your iPhone, iPad, or iPod touch to turn on two-factor authentication."
And, Use the “learn more” link above to see more about the Availability of two-factor authentication for Apple ID https://support.apple.com/en-us/HT205075. From this link: "While most iCloud users can now turn on two-factor authentication, certain account types may still be ineligible at Apple’s discretion."