Pulling them out is possible when small, https://canberra.naturemapr.org/sightings/4448885. Seedlings have horizontal roots, https://canberra.naturemapr.org/sightings/4228401, and can sucker. It looks as though this one already has a sucker. Dig it out or cut and paint with glyphosate.
Hejor1 from my experience this species is hard to pull, only when very small (2 or 3 leaves) and the soil is friable; best to cut and paint/spray the cut surface.