Hello, i have 22.9 gb of 50gb free space in icloud i it says theres not enough for back up. What can make this issue?

petar106 wrote:

I have 22.9gb of 50gb free space in iCloud

That is not what your screenshot states!

Your screenshot indicates that your current iPhone backup housed in iCloud (from June 3) occupies 22.9GB. That, combined with your other iCloud storage, means you do not have enough iCloud storage to perform another backup.

If you wish, you may take a chance by deleting the current iPhone backup and then performing another one. Or a better alternative would be to reduce your iPhone storage.

See especially “If an alert says there’s not enough iCloud storage” here. Note especially step 4.

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