>>106138355
I did manage to find some of the posts, this is pretty much right around when /lig/ was born too, pretty much just a week before our first thread
>>16625035
>>16626035

These are about as early of mentions of senz beating bao as I can find too.
still struggling just as much as ever to find clips of the stream where it might have happened. It would have been in the Fall of 2020 most likely, this seems like the most likely candidate since Doki is there however from the saved clips it's not immediately clear if senz showed up here
https://twitchtracker.com/harukakaribu/streams/40488363710

Of course there were other things that came later like the "wellness check"s and such, but this is pretty much where it started as far as I can tell.