Use the tips here: https://forum.inaturalist.org/t/how-to-use-inaturalists-search-urls-wiki-part-2-of-2/18792#heading--annotations
If you do this: https://www.inaturalist.org/observations?place_id=any&project_id=bioxtbg&subview=table&taxon_id=47157&verifiable=any&term_id=1&term_value_id=6, you’ll get all the Lepidoptera observations that have a Life Stage Annotation (note that tags are something different) equal to Larva