Why is icloud not backing up daily

Are you unable to backup to iCloud at all - or are you experiencing difficulty with automatic backup to iCloud?

When initially enabling iCloud backup, the automatic backup process won’t run until you have manually triggered an initial backup from iPad settings:

Settings > [Your Name / AppleID] > iCloud > iCloud Backup > 

• Backup This iPad - set to ON
• Backup Now

After the initial backup, the next automatic backup should run when these conditions are met:

• 24hrs or more have elapsed since the last backup
• the iPad is connected to its Power Adapter
• the iPad is connected to WiFi
• the iPad is locked

If an automatic iCloud backup doesn't run for an extended period, you may need to trigger a manual backup to restore regular backup to iCloud.

More information about backing-up your iPad - and troubleshooting if needed - can be found here:

How to back up your iPhone, iPad, and iPod touch - Apple Support

If you can't back up to iCloud - Apple Support

This shows no recent issues at Apple's end:

Apple - Support - System Status

However, if your ISP uses CloudFlare services, CloudFlare is having a bad hair day that affects many web sites and services:

https://www.cloudflarestatus.com/

Also: Cloudflare apologises for outage which took down X and ChatGPT

Do you routinely shut-down your iPad - perhaps overnight, or for a day or two?