This could get you half way there, perhaps: https://forum.inaturalist.org/t/how-to-use-inaturalists-search-urls-wiki-part-2-of-2/18792
Especially the “Sort by Dates, Faves, or Randomly” section, so you could add the following text to the end of the url in “Your Observations”:
?order_by=observed_on&order=asc
which sorts by first observed in ascending (first-to-last) order, and then filter by a species / group of interest. Ideally you would only show a single observation per species, which I’m not sure how to do.
In full this would be something like: https://www.inaturalist.org/observations?order_by=observed_on&order=asc&user_id=henicorhina just replace my user ID with yours