I don't think it's right to act like Anna is some tramp, but based on what we've seen on her social media (things that are borderline transphobic, ignorant of other cultures despite being apparently well-traveled, party lifestyle, flouting covid rules, etc.) it's just hard to think that Joe, who supposedly dumped Niomi because she is so vapid and not a great person, would find his future wifey merely months after a broken engagement with someone like Anna (or what we know of her publicly)
I think that's why people are calling her a rebound lol