As an example when I was active in housing in Chicago one of the organizations that was with us on the left was a developer of affordable housing: https://www.bickerdike.org/

Several of the activist actually worked for this developer.

Real leftist housing rights supporters are not against developers. They are against for-profit, private equity, land banking speculators, and yeah nimby homeowners. In general we hated the Oak Park type nimby liberal more than we hated the right to be honest.