Too be fair, I missed it once too.
And just FYI, there are some limitations to the Taxon search there.
Example, I wanted to subscribe to genus Sea, a butterfly taxon.
The taxon serach in subscriptions only loads the first 31 taxon matches, and the butterfly genus isn’t in those 31. In this instance, Genus Sea is monotypic, so I got around it by adding the species Sea sophronia , but for underrepresented taxons with multiple species, adding every sub-taxon might not be a viable workaround.
[SHAMELESS PLUG: Please upvote my feature request for the taxon/place subscriptions to “show more” Oops, it’s been closed.]
: https://forum.inaturalist.org/t/show-more-results-when-subscribing-to-taxon-or-place/10232