Not saying that this is the case, but I know when I am out doing big trips the last thing I look at is the news. Many times I will be camping under the wing at small isolated airports and could go 3 or 4 days before really talking to anyone. This all happened pretty quickly so unless they admit that they knew it is still possible that they are so tied up in their travels and their adventure that they didn't know anything about lockdowns....
PS. with their social media posts I would say this is not the case because they would still be receiving information, but for Old Fart's without social media and the need to be updating everybody about what they have eaten for their previous meal, it is possible that there could still be people out there flying around and having an adventure and still don't know about lockdowns