More than 25 devices are expected to receive MIUI 13 by the end of this year. This includes many Mi, Redmi, and Poco devices with some minor changes to the list we had reported previously. Apparently, Xiaomi has already begun testing MIUI 13 on several Mi flagships indicating an imminent rollout.
https://www.notebookcheck.net/MIUI-13-stable-already-being-tested-in-several-Xiaomi-flagships-more-than-25-Xiaomi-Redmi-and-Poco-devices-slated-to-get-updated-in-coming-weeks.580131.0.html