It was relatively straightforward. Like the other person said above, it was probably more limited in terms of people on site compared to a normal time. My group only had like 9 people in it. There was some pre-arrival COVID paperwork that you had to abide to, but in terms of the rest of processing I would say it's very similar to a normal FC1. If you had COVID at some point they do some more extensive testing on you, including:
2 hours of breathing into a machine to determine lung function/capacity
Echocardiogram, again takes about 2hrs
Wear a Holter Monitor for 24hrs, basically a portable EKG
Wear a portable pulse reader and walk around to get more readings
No one in my group had prior tested positive but this is what I heard from previous people who'd gone through after having it.