Xiaomi has unveiled the Redmi Note 8 2021, but it has barely made any changes compared to the device it has been selling for nearly two years. The new model arrives with Android 11 and MIUI 12.5 though, so it should receive another two years of OS updates, unlike the Redmi Note 8.
https://www.notebookcheck.net/Xiaomi-releases-the-Redmi-Note-8-2021-with-questionable-changes.540836.0.html