The 3D Model Repository sounds like what you want. https://wiki.openstreetmap.org/wiki/3D_Model_Repository
Wikimedia Commons might work for this, too. https://wiki.openstreetmap.org/wiki/Wikimedia_Commons#3D_mod...
Tangentially, if you aren't already aware of them, you may be interested in OpenDroneMap (ODM) https://opendronemap.org/
and OpenAerialMap (OAM) https://openaerialmap.org/