In the Message Center Microsoft (MC215163) reported that suggested replies will start rolling out to Teams mobile app
in July. The rollout should be completed in mid-July. This features will give users suggestions on what to answer in a chat in both iOS and Android apps.
Update from Microsoft We will begin rolling this feature out in August (previously early July); the rollout will be complete in September (previously mid-July).
Users can turn off this feature if they want to from the settings in the app.
This feature will be turned on by default but Administrators will be able to turn in off in a Messaging policy. Turn off the setting Enable suggested replies.