If you go to the update article, 2021 eBird Taxonomy Update — IN PROGRESS - eBirdBotW might be updated (I haven't looked through in any depth) but I assume the eBird side is incomplete due to the lack of a news or twitter post suggesting it is finished, and the unresolved (but resolvable records). I actually don't know how to search for the species pairs, I had to think about some times when I saw some of the suspect species and manually search for the lists... in the lists you see the species pair in black text (not a link), and you cannot successfully search your own records for the species pair. I'm assuming this will get resolved at some point here
Go down to the species section and you can search 'my records' against the relevant split.
I agree in saying with no notification it is best to assume 'still in progress'