Species complex taxa can be and have been created in iNaturalist. There are links and discussion ongoing on that topic here:
https://forum.inaturalist.org/t/large-genera-with-formal-species-groups/11073
This could be one limited way to implement @nomolosx request. If a species is included in an iNat complex, then that could be the trigger for a warning banner. And maybe Computer Vision could be restricted from suggesting anything finer than the Complex taxon, if any of its component species are among the suggestions.