If the home is listed for sale and I have appraised it before, I will take the assignment as I can document current condition using Realtor photos and interview.
Otherwise, without an interior inspection who the heck knows what is going on in the house right?
You might find a lender that has a policy allowing an appraisal without an interior inspection. It will likely depend on the type of loan, loan amount and your credit score/income/assets.
As an aside, in the early going of the Covid scare I would use booties, mask and gloves when inspecting, but I didn't do it for long. Now I just have to try to keep people from shaking my hand. Most folks are not so worried about it.