@pisum created a helpful tool for using iNat’s API to search IDs (rather than observations) - you do still need to edit the URL rather than use dropdowns/text filters, but like this for example: https://jumear.github.io/stirfry/iNatAPIv1_identifications.html?taxon_id=53817&rank=genus&user_id=eleodesthermopolis
See also this feature request: https://forum.inaturalist.org/t/search-and-filter-identifications/1304/46