That was amazing! It was the third M17-Ō bout ever, according to my query. Two of them are from 2020, and those are the two that weren’t losses, a playoff, or before the six tournament system! All three were finished with yorikiri too.
There’s also an M16-Ō bout on the books, from a basho when M16 was the bottom of Makuuchi, and an M15-Ō match from when that was the bottom. Both were another loss for the maegashira involved, so it does seem to be a 2020 thing.