I was laid off early this week. Other than my direct manager, none of my remaining coworkers have reached out, even though we were all close and got along well. It feels very odd to me. I have survived layoffs in past jobs and I always checked in on former colleagues, offered to write LinkedIn recs, etc.
Tip for layoff survivors: check in on your former colleagues! Even a quick LinkedIn message to say hi and sorry it ended. It can feel very isolating and it's nice to receive a friendly note.