If you don't want to be disturbed by the cleaning robot at certain times, you can turn on the Do Not Disturb mode.
In Do Not Disturb mode, no scheduled cleaning will start, no cleaning from the breakpoint cleaning will perform, no voice prompt will play, and the power indicator will dim.
It is set from 22:00 to 08:00 by default if you turn the mode on. But you can change settings by tapping the hamburger menu at the upper right corner - [Advanced Settings] - [Do Not Disturb].