Safari bookmarks and files missing from iCloud backup

Hi, I recently decided to backup and reset my iPhone using the “Prepare for New Iphone” button on the transfer and reset section of settings. After completing the backup, I wiped the phone and did a restore. All of my login data disappeared so had to manually add them back in. However, when I checked my files app, I realized that on one of my folders, 9 out of the 11 files saved in that folder disappeared. I tried checking everywhere, even on the recently deleted section of the iCloud website, but found nothing. My Safari bookmarks are all gone as well. Please help me find a solution to this, since I do not have an extra copy of those files anywhere else. Thank you in advance.