Functionally, Boardman place isn't wide enough to be a "pedestrianized street" - which is what the pedestrianized tag is supposed to represent.  Note the last sentence in the opening pargraphs of the pedestrianised street wiki page. https://wiki.openstreetmap.org/wiki/Tag:highway%3Dpedestrian

The City's GIS represents all registered (but city-owned) public ways. That is, there is some amount of legal access. Regardless, ownership doesn't imply what to do with the highway tag. The function of the public way, in this case is much more a footway than a pedestrianised street.