FDM Group Graduate Software Engineer interview questions

I applied for the London-based graduate scheme. The interview process happens after I completed 2 tests, which included a technical skill test and a game-based aptitude/behavioural test run by Arctic Shores. I received an invitation to a phone screening interview, and during the call I was offered an in-person interview date. The in-person interview includes a short introduction talk about FDM, afterwards I sat in a room with the other candidates and waited to be called in for interviews. Each candidate gets interviewed by 3 people (CV blind) and gets asked 4-6 strength-based questions. Because there are only a handful of interviewers and a room full of candidates, I had to wait about 30-40 mins between each interview. I did get a congratulations I have passed all the tests and interviews from my recruiter, but apparently they don't have a start date yet. I was updated by my recruiter last week and they said there still isn't a start date, and it has been a bit more than a month.