NFL Coach says Mahomes "flopped"

[SunsetBengal]

From re-watching the clip several times, it appears to me not to be a push or a flop, but rather both players falling with their own momentum as a result of incidental contact when their feet briefly tangled. Rather than a knee-jerk personal foul flag, the crew in NY should have taken a closer look and instructed the crew on the field to waive it off as no foul as a result of inadvertent contact.