Deepa,
There are no "recommended" places to take the exam - it will be a matter of your preference. For me, I would have preferred to take it at an exam center for a couple of reasons:
1. I'm there for a reason. I will not have the distractions of "home" - dog, cat, spouse, kids, delivery person, whatever.
2. Dealing with a living person at the check in is much preferred over dealing with some unaccountable talking head at the other end of the camera.
Early in the COVID crazy-times, the testing centers here in the US did get closed for quite some time. That is when PMI/Pearson Vue moved to online availability. The centers here in Illinois (USA) started opening up last July, but not fully. Yes, they did cancel booked exams. I do not know anything about rescheduling fees associated with government-mandated closures of in-person centers.
With respect to procedures: Check in procedures for both in-person testing centers and the on-line version have been detailed numerous times at various locations on this board, Pearson Vue's website and, I think PMI's site as well. I've not heard a single nightmare story about the check-in procedure at an in-person center while there have been several nightmare reports for the online version.
Good luck on your exam!
Harry
+++++
Harry J. Elston, Ph.D., CIH, PMP