Covid has taken a toll on a lot of people in the most various ways possible. Some people lost a family member or a friend, some got left weak from getting it themselves, some lost their jobs (as in some countries a lot of businesses closed down during quarantine, or some had a boss that decided to fire half his workforce to "make up for lost profit"...), meaning they had to dedicate their time to finding a new one, or even their spouse lost their job and both have so search in a hurry...
Either way, if he stills logs in and doesn't post anything, my bet is that he's not in a good headspace for it. Even without losing someone, some people got hit heavily with depression. Might be the case.
All we can do is wish him the best and wait for when he feels strong enough to give an update. We're grown up adults (well most of us on this thread at least), we can be patient.