SpaceX Interview - onsite

I finished interviewing with HM for more than a week now but haven’t heard from recruiter. I reached out, but response is they are still deciding.

Next may be onsite but may have 1 technical phone. Screening + HM interview so far and 3 weeks now.

Any feedback on timeline for folks that interviewed at spacex? How long are they apart and what to expect for the onsite? Thanks