Hi sulak130,
We appreciate you reaching out to us about your iCloud storage. Rest assured that we'll do our best to assist you or get you pointed in the right direction.
We understand that you are asking about the Safari-related data that are synced to your iCloud.
We recommend updating your iPhone if you haven’t. While it isn't inherently assured that an update will resolve the issue, updating to the latest version of iOS for your device can help isolate potential software issues. Kindly secure a backup and update.
How to back up your iPhone, iPad, and iPod touch
Update your iPhone, iPad, or iPod touch
If you are looking to manage your iCloud storage, the article below may help.
Manage your iCloud Storage
Please keep us posted.
Take care!