This makes a lot of sense, considering the Pulitzer is designed to award the text, not the production. Given the circumstances, I think this is exactly the right course of action.
As for the contenders: I really couldn't say, since I haven't been keeping up with any of the streamed plays, and naturally, we didn't get to see most of the cancelled productions.
However, I would love to see Endlings by Celine Song get recognized.