Hello there,
That's a good question and I can definitely help with this. If you go to Settings > [your name] > iCloud > Manage Storage > Backup > [iPhone name] > Delete Backup. After you have deleted your Backup Restart your iPhone
Once your iPhone is on, Connect to a Wi-Fi networkand go to Settings > [your name], Backup > Backup Now and plug your iPhone into power and leave it connected to Wi-Fi
The time of when the backup should be displayed there, if it is not please reply to this post and I will be more than happy to help you further.
Happy Holidays,
Vis
iPhone X 64GB Silver