A report suggests that the Redmi K30 Ultra and Xiaomi Mi 10 Ultra will be exclusive to China. A Xiaomi representative has confirmed that the company doesn't plan on selling either handset internationally, even as a Poco device.
https://www.notebookcheck.net/The-Xiaomi-Mi-10-Ultra-and-Redmi-K30-Ultra-will-not-be-released-globally.485479.0.html