"Definitely a possibility"? We were still going about our business as usual until the beginning of March, there was absolutely no indication in January to most people, businesses or seemingly even the government that we'd be in lockdown. I'm not sure how you're expecting a games developer/publisher to be better at contingency planning for a pandemic than the rest of us.
There's probably also the fact that with thousands dying daily it's perhaps not the best time for a massive marketing campaign for a game with the sort of themes TLoU2 has, the media would slaughter them.
Agreed, and even if they do somehow launch, various other games will undoubtedly have been pushed back by then too so there might not even be much worth buying a new console for until a good year or so later.