I see a lot of people online saying that this is from the China's Zhuque-2E Y5 rocket. I thought this must be an error, because that occurred at this time last year. So, I thought maybe a better answer was commented by someone who goes by the name tommyokie, "It might be the upper stage venting from the "NROL-172" launch by SpaceX from a couple days ago."
Then I saw this article on spaceweather which says that it is methalox (rocket fuel from a Chinese rocket) again...
A 'METHALOX COMET' OVER THE USA: Last night, a glowing comet-like apparition swept across the skies of the central United States--but it wasn't a comet. It was a Chinese rocket.
"We just had another satellite fuel dump event here in the Midwest," reports Dan Bush of Albany, Missouri, who photographed the display:

"This one was much larger than previous dumps I have seen," he says. "It began around 4:16 UT (May 14th) and lasted for about 10 minutes."
The source was China's Zhuque-2E Y5 rocket, which lifted off about an hour earlier carrying a 2.8-ton payload to a 900-km polar orbit. What sets this rocket apart is its fuel: liquid methane and liquid oxygen, or "methalox." When a methalox upper stage vents its fuel, the cryogenic propellants flash-freeze into a distinctive comet-like cloud of tiny ice crystals.
Methalox is a new and increasingly popular rocket fuel, offering several advantages over traditional fuels. Methane is easier to store than hydrogen, burns cleaner than kerosene, and can be produced on Mars. Methalox can now be found in the tanks of SpaceX's Starship, Blue Origin's New Glenn, and a growing fleet of Chinese commercial rockets.
The
first widely-observed methalox comet appeared only one year ago over Colorado. Get ready for more. The era of methalox is just getting started.
Solar flares, geomagnetic storms, auroras, and near-Earth asteroids.
www.spaceweather.com