It's an ongoing thing, nobody is expected to know the full extent of it at the beginning regardless of what party they belong to. The last thing we want is a president running around declaring the end of the world at every little thing that pops up. It's better to gauge them by their actual actions as the development unfolds and even democrats have agreed with Trump on that.
Hell, even Biden is now saying that Trumps travel ban was a good idea after criticizing him and calling him racist for months for doing so. You realize that if Biden were president when this went down that it would have been much worse in America because Biden wouldn't have restricted people like Trump did. Trump was mocked for saying that a malaria treatment may hold a cure for the virus and it turns out that he might have been right.
Democrats have been on the wrong end of everything in regards to their responses to this crisis.