No, this is a herm. The rectangular structure distinguishes it from anything else.
They do not really have anything to do with
Priapus. The original Greek
Hermes was a phallic god first. But then herms were used for
other gods too.
Apparently, the all-pillar herm like this was Greek and the
Roman ones
had more of a
bust form on the upper
part.
It would make sense that this
comes from the Eastern parts of the
Roman world - Ukraine was really Greek.
SC