Great write up! Funnily enough I actually published a paper last year on something very similar: completeness of Australian terrestrial invertebrates on iNat. Open access paper here: https://doi.org/10.1002/fee.2604
Here’s our main figure looking at completeness as of 2021, and how it changed from 2020:
Figure 1. Recognition and completeness of Australian terrestrial invertebrates from photographs uploaded to iNaturalist across 39 iconic taxa (for 2020, n = 527,313; for 2021, n = 1,013,171). The size of each point is scaled to the log of the number of observations for that taxon. The colored rectangles were manually drawn to group what we perceived as taxa with similar recognition and completeness on iNaturalist, based on the 2021 dataset. Capital letters A–D denote each group.
Odonata was also top of the charts for Australia!