About three months ago, they started re-roofing a community center near me. They got the bottom layer done - tarpaper, or whatever it is, and then stopped. (This was still dry, summer weather.) After a few weeks of inaction, as autumn rains approached, they covered the whole thing with plastic sheets, as it remains to this day. I’m concluding they are unable to get the shingles needed to finish the job.
Or they no longer have the labor. Roofers are in short supply. It is hard hot work when you can get paid better driving for Uber or Doordash or any one of many delivery options.