this is a bug previously noted at https://forum.inaturalist.org/t/year-in-review-sunburst-chart-does-not-incorporate-observations-of-non-leaf-taxa/26389/3.
you wouldn’t want this implemented as a toggle. it just needs to visualize the observations that are stuck at higher-level taxa one way or another.
this will produce a sunburst chart for your observations, appropriately handling those stuck at higher-level taxa, but it gets really busy since you have many taxa: https://observablehq.com/@robin-song/inaturalist-observations-by-taxon?user_id=clightowler. you could add &chart_type=sunburst_zoom to get version of the chart that will show 2 rings at a time.
or you could modify the code to produce other versions of the chart. here’s version of the chart where i’ve added &taxon_id=47170 (for Fungi) to the reqURL variable in the apiResponse code block:
