I cannot turn on my iCloud backup switch to on

Hello,

I am having a difficult time understanding your question. Could you please restate your question while providing as much detail as you can?

Writing an effective Apple Support Community post

Is iCloud backup grayed out? If so, do you have an employer provided account on the device, r an employer profile with it? Those can disable your ability to backup if your employer’s policy is to not allow work data in personal backups.