The SMS icon at the bottom of the mobile phone desktop has disappeared. How can I get it back?

1. Take Huawei P 10 as an example to open the "Settings" application of mobile phone;

2. Select the "System" option from the drop-down box in the setting interface;

3. Next, select the "Backup and Recovery" option in the system interface;

4. Select the "cloud backup" option in the backup and recovery interface;

5. Next, select the backup date before the SMS icon disappears in the cloud backup interface;

6. Next, select the "Restore" option in the lower right corner of the backup details interface;

7. Next, select the "Restore" option in the pop-up box, so that the disappeared SMS icon can be retrieved;