Oh cool, thanks! I missed that it was the right-turn I needed to restrict, not the U-turn (which would be Bexley Road onto itself).

OSRM and GraphHopper. Valhalla correctly routes via a different street.

See the link below for a demo of OSRM doing it:
osm.org/directions?engine=fossgis_osrm_car&route=-33.93198%2C151.10990%3B-33.93297%2C151.10766#map=19/-33.93258/151.10887

Without this turn restriction routing algorithms direct you to illegally make a U-turn here.

Thanks for the info; I was wondering how to handle 1300 numbers.

That was my mistake. Thanks for fixing it!

Description should be Ingleburn Memorial Park, not Milperra.