In the beginning, wake up the screen on your device by pressing the Side button.
Next, swipe upwards from the bottom of the screen to open the Quick Panel.
Now tap on the Do Not Disturb Mode icon to enable the mode.
To disable it tap on the icon again.
Source : hardreset.info
Note :
Disable Do Not Distrub Mode XIAOMI Mi Watch LiteThis content is uploaded by APP SETUP DEVELOPER and available on Google Play Store. APP SETUP DEVELOPER do not own this content and this content credits to their respective owners listed in the source link. Hopefully useful and share this app.