You can set the time you’d like to receive notifications in the app’s Profile menu.
If you want to turn notifications off completely, you can do so in your phone’s settings.
You can find more information about how to control notifications on Android here:
https://support.google.com/android/answer/9079661?hl=en
And you can find a guide to notification settings on iOS here:
https://support.apple.com/en-gb/guide/iphone/iph7c3d96bab/ios