To provide the requested clarity, iNaturalist has never tried to enter all of the US state-level statuses from NatureServe. Only Canada has had extensive work with subnational NatureServe statuses, thanks to the close relationship through iNaturalist Canada.
The main way that national and subnational conservation statuses are entered on iNaturalist is when new countries join the iNaturalist Network. Since we don’t have something analogous at the state level in the US, the iNat statuses are a patchy reflection of the curator community activity and possibly some bulk request from a few states in the past.
I’ve created a template with a few examples and some instructions to facilitate formatting for anyone interested in adding more conservation statuses and associated taxon geoprivacy.