As far as I remember, there were 2 references to his absence. On one of the Hillary documentary episodes, Chris mentioned that Virgil probably wouldn't be back on the show until after the pandemic blew over. The other time was during one of Matt's streams: someone asked him about it, and he said that Virgil basically wasn't talking to them (apparently he sent over some material to be discussed on the show, but they decided against bringing it up as he wasn't talking to them).