Are there any monsters that can target more than one target/creature?

I noticed that the attacks in Statblocks mention one target (and sometimes one creature). This made me curious. I have been pouring over the MM and VGtM, but have not found any monster that can make a melee/ranged attack against more than one target / one creature.

  1. Do we know of any example within the ‘official’ books where this is more than one?
  2. If it’s always one, do we know of any reason why this is at all mentioned in the statblocks?

Related: Are there any issues with creating creatures that can make multi-target melee attacks?

Related: In the descriptions of monster action options, what's the difference between "one target" and "one creature"?