Can you explain further? As written, the question doesn’t really make sense. You can’t enable TFA for other people, because the essential nature of two-factor authentication is that they’re proving that they have something which only they have.
I meant how do I enable 2FA for other vendors so that if they chose to, they can use it. Right now using WCFM I don’t see option available for individual vendors to enable 2FA if they chose to have it enabled.