I mean... ok, maybe not literally nobody, but LibreOffice has 50x the contributors (1314 vs 26) and 60x the commits (500k vs 8k). Apache OpenOffice's last major version was more than a decade ago. It may not be dead-dead, but it's at least in a very long coma with zero chance of revival.
I don't know why Apache doesn't just shut it down; it serves no purpose anymore.