I don't see the turn on "Access iCloud Data on Web" under my icloud on my phone

Hi Maebe12,

You started from a great resource: Manage web access to your iCloud data - Apple Support

As mentioned in the article: "You can manage iCloud.com web access in iCloud settings (requires iOS 16.2, iPadOS 16.2, or macOS 13.1)."

In your post notes it shows that you're using iOS 14. Therefore, this feature wouldn't be available unless you update the iOS. If you're using an iPhone 11 Pro as mentioned in your post notes your device is compatible. Find a list here if needed: iOS 16 and iPadOS 16 are compatible with these devices - Apple Support

Prior to updating ensure you have a backup of your device, and use the assistance of a computer to update as there have been multiple updates since iOS 14. The articles below can assist.

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

Update your iPhone, iPad, or iPod touch with the Finder

Update your iPhone, iPad, or iPod touch with iTunes

You can also find helpful information about controlling access to your personal data here: Understand and control the personal information that you store with Apple

Best.