You can add links to the Taxon pages under the About (Informazioni) tab (see https://forum.inaturalist.org/t/photo-taking-recommendations-by-taxon/1962/24). Look on the right there is a blue button with Add Link (Aggiungi collegamento). You can add links to comments or journal posts on iNat, or to external sites.
For southern Africa we have a traditional project called Keys (s Afr) - https://www.inaturalist.org/projects/keys-s-afr - and we add observations to the project that have ID notes, diagnoses, distribution info or keys. Perhaps you could start a similar project for your area or taxa of interest?