Hello verna52 and welcome to Apple Support Communities,
If we understand your post correctly, you've been unable to complete a backup of your iPhone. Keeping a current backup is certainly important. We’d like to help.
We see you were viewing "How to back up your iPhone or iPad with iCloud - Apple Support" and it did not resolve your issue.
These steps may help:
If your iCloud backup is taking longer than expected to complete
1. In iOS or iPadOS, go to Settings > Wi-Fi. Check that you're connected to Wi-Fi.
2. Check your upload speed.
3. Leave your device connected to power and Wi-Fi for 24 hours. If your backup still isn't done, archive important data then contact Apple Support.
See the full article here:
If you can't back up to iCloud - Apple Support
Let us know if that resolves this issue for you.
Thanks for using the Apple Support Communities.