How to upload my backup on my new iPhone?

How to transfer data from your old iPhone to a new one with iCloud 

1. Connect your old iPhone to Wi-Fi.
2. Open the Settings app.
3. Tap [your name] > iCloud.
4. Select iCloud Backup.
5. Tap Back Up Now.
6. Wait until the backup process completes. 

Once you have a backup, it’s time to pick out your new iPhone and start setting it up:

1. Turn on your new iPhone. 
2. Select your country and language.
3. Follow the onscreen instructions to connect to Wi-Fi, set up Touch or Face ID, and create a passcode.
4. Once you reach the Apps & Data screen, tap Restore from iCloud backup.
5. Sign in with your Apple ID.
6. When asked, select the backup you’ve just made on your old iPhone.
7. Wait for your data to transfer from your old to new iPhone.
8. Complete the rest of the onscreen setup steps.