A few weeks ago, new information surfaced claiming the Redmi Note 7 would receive the Android 10 update in the first half of May. We're already in May, however, and a new statement from a similar source has now indicated that Redmi Note 7 owners may have to while a while longer; perhaps till the MIUI 12 rollout.
https://www.notebookcheck.net/Android-10-for-the-Redmi-Note-7-may-ultimately-come-with-MIUI-12-ETA-unknown.463804.0.html