First of all, regardless of the interview results, professional headhunting consultants will give you a feedback. There may be two situations now:

1.？ The interview feedback is not good, the headhunter can't come up with specific reasons, and there is a lack of communication, which leads to you not getting further feedback.

2.？ It may not be a bad interview, it may be delayed by other reasons on the client's side, or the position HC has not been approved, and so on. And the interview process for some positions may be longer.

I suggest you look at other opportunities while waiting!