Finished 2nd round, what's the timeline for EE role?

Hi, I recently had my 2nd round interview for the EE role in the CVD team. It's been around 2 weeks since the interview. Earlier this week I got a Visa Survey from the team. I didn't get anything after that. I tried to follow-up a couple of time with the HR and the recruiter I was in contact with, but there's no response so far.

What's the usual timeline for these role? What can I possibly do? Any help would be appreciated. Thanks.