With very narrow leaves that are hard to see in these photos, I am inclined to agree with your ID. https://keys.lucidcentral.org/keys/v3/plants_se_nsw/key/plants_se_nsw/Media/Html/entities/wahlenbergia_luteola.htm I signed off on this key several days ago. Lucid is now creating the app.
Yep, I've compared it with my W. luteola photos and it does look very similar. The brownish colour on the outside of the flower does tend to be variable in intensity, sometimes not all that obvious as in this plant.
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