you can create maps with multiple layers of different observations using this: https://www.inaturalist.org/observations/compare
(see https://help.inaturalist.org/en/support/solutions/articles/151000170738-how-to-use-inaturalist-search-urls if you need help with parameters.)
you can also use your own preferred tools to create custom maps using iNaturalist’s observation tiles: https://forum.inaturalist.org/t/in-pursuit-of-mappiness-part-1/21864
or you can create more exotic maps using UTFGrids. examples:
- https://forum.inaturalist.org/t/identifriday-is-the-happiest-day-of-the-week/26908/1353
- https://forum.inaturalist.org/t/looking-for-inaturalist-observation-map-visualisation-suggestions/7322/11
or you can just download a bunch of observations and then visualize them however you like.
…
because “recent” can’t be reasonably defined consistently across use cases, i think trying to build functionality into the system is unlikely to happen. but maybe someone would be willing to make a third-party tool that would help your workflow, if the first item above doesn’t work for you for some reason.