yeah e.g. here are 16k observations already tagged with interactions they missed out on reviewing: https://www.inaturalist.org/observations?place_id=any&taxon_id=47822&field:interaction->visited%20flower%20of=
also related: the (hidden) “interactions” tab: https://www.inaturalist.org/taxa/55719-Eristalis-tenax?test=interactions (took a while to load for me)