(In closely related news, just try buying a house during a pandemic, I dare you. There are amusing pictures floating around online of my wife and I shoving documents back and forth through barely-cracked car windows for notarization ...)
Did that. (Offer made and accepted in August; moved in on October 1st.) All of the legal paperwork was done online on the basis of "here's a scan of two pieces of ID and click click click I agree" -- the only "shoving through a window" moment was with a bank draft, and even that could have been done digitally if I had been comfortable with transferring such a large amount of money based on instructions received via email.
Rules vary from state to state; in BC they were changed early in the pandemic to remove the need for in-person transactions.
I closed on a house a month ago. Notarization was done online by smartphone. Worst part was working with a local bank that had little to no online services.