Going by information released on Xiaomi's official forum, the company plans on sending out the Pie update to a host of devices over the next couple of months. The Redmi Note 5, for one, is expected to get the update before this month runs out.
https://www.notebookcheck.net/A-bunch-of-Xiaomi-phones-are-set-to-receive-Android-Pie.414490.0.html