Per ESPN Research, the Ravens are the 3rd team in NFL history to lose a game by 20+ points after leading by 13+ points at halftime.
Other two times it happened: 1950 and 1941.
Looking at the final drive, Burrow opened it with three of the most clutch plays of his career. Incredible stuff to get the Bengals down the field. Then, the first down play on the next drive should have been DPI (and the second down play was a miscommunication).
The red zone pick earlier was a bad one, but his play on that final drive says a lot about how good of a game he played.