ICloud

Hi Amberschild,

Welcome to the Apple Community.

Apple support have an article online (link below) to help you.

You might want to check your settings,

and see that everything is set up so iCloud can work smoothly.

Set up and use iCloud Photos

Eg: Your photos and videos are stored in iCloud in their original formats at full resolution.

This includes HEIF, JPEG, RAW, PNG, GIF, TIFF, HEVC, and MP4,

as well as special formats you capture with your iPhone or iPad, like slo-mo, time-lapse, 4K videos, and Live Photos.

https://support.apple.com/en-us/HT204264

If you need more info:

More articles follow.

Set up and use iCloud Photos on all your devices

https://support.apple.com/en-au/guide/icloud/mm7e90c1ba48/1.0/icloud/1.0

Upload and download photos and videos using iCloud.com

https://support.apple.com/en-au/guide/icloud/mmb5dbaf376f/1.0/icloud/1.0

How iCloud Drive works

https://support.apple.com/en-au/guide/icloud/mm19ef899373/icloud

Use iCloud Drive on iCloud.com on your iPhone

https://support.apple.com/en-au/guide/icloud-iphone/mmd0b4a7f5e8/icloud

Set up and use iCloud Drive on all your devices

https://support.apple.com/en-au/guide/icloud/mm203b05aec8/icloud

Still more info:

iCloud Support

https://support.apple.com/icloud

Hope this helps you :)