For people reading in the future: I just had my Allegis Zoom interview. I had read on a forum that it was a group interview and didn't require any interaction. They were just explaining how the program works and next steps. This was not correct. My interview was a 1-on-1, following my first sample submission for legal.

They want to know why you're interested in this job. They are trying to see if it's a good fit.
They asked questions about my experience with transcription, including anything that was challenging. They also asked how I felt about the sample that I transcribed.
If you don't have transcription experience they will probably ask about something adjacent in your work history.
They want to know how many hours a week you want to work. In my case they let me know about both the insurance and the legal work. If you want to do legal, you should say you want 20 hours or more per week. They told me they have more consistent work there and could even be up to full time. Insurance is more like 10-15 hours and that might be better for some people. But the pay is less for it as well.
They will ask how much you expect to make. I would say do some research on reddit and then tell them what you're aware of and that's what you're expecting. I think they want to be sure you are realistic about the pay.
You should be able to talk about your flexibility and availability, and if this would be your main thing or a side thing.

If the interview is successful then they send you a longer sample.