@Karishma14 Yes, they will be able to do a review becauase they stayed. If you are concerned you can offer a partial refund for any unused nights via Airbnb, your choice, but under my strict cancellation policy I havent (as nothing wrong with accommodation provided like @Karen114 mentions).
I am concerned you mentioned all five days they booked are now open. You might want to check and see if a refund request is coming from them or Airbnb.
Just remember you also have a right of reply so when doing your review leave this part until after you read theirs (assuming they do one).