Filter using a pinned location

i think your question is basically the same as the one from this thread: https://forum.inaturalist.org/t/how-to-view-observations-hidden-behind-identical-coordinates/43159.

this may also be useful: https://forum.inaturalist.org/t/how-to-use-inaturalists-search-urls-wiki-part-1-of-2/63#heading--bounding--area