Similar to SMS delivery reports, we can enable or disable a read receipt of sent MMS messages on the Xiaomi smartphone.

Note: When using Dual SIM, we can set the setting individually for each SIM card.

Android 10 (MIUI 12.0)
Step 1:  Open the  Messaging app
Step 2:  Open the  Settings
Step 3:  Tap on  Additional settings
Step 4:  Tap on  MMS read receipts
Step 5:  Enable or disable  MMS read receipts
  1. Open the Messaging app
  2. Open the Settings
  3. Tap on Additional settings
  4. Tap on MMS read receipts
  5. Enable or disable MMS read receipts

Xiaomi Instructions