The height of the plant (under 30 cm), the fact that it is autumn flowering, and the length of the calyc lobes (up to 12 mm long) suggest that it is Gentianella muelleriana. These characters are in the Plantnet key. The only subspecies of muelleriana listed in the ACT Plants List (2017) is subsp. jingerensis. It also fits the Plantnet description of that subspecies. https://apps.lucidcentral.org/plants_se_nsw/text/entities/gentianella_muelleriana.htm This is a late draft of the fact sheet in my app.
Hi John, There is a flower weevil in your top image above and a probable pollinator. I only saw your picture after checking significant finds reporting a carpenter bee at Gundarroo