This might win the title of least helpful post on the internet.  We know what 2FA is.  That’s why we use it.  Your app doesn’t support it properly - as evidenced by the fact that I can add an account fresh and it works great - but it will never update / trigger 2FA ever again.  Stop blaming / demeaning your customers - it’s YOUR software that is garbage (I’m a software engineer with decades experience of experience).