How can I move my files now from my iPhone to iCloud

If you delete Photos / Notes / Voice Memos / Videos / Reminders from the iPhone it is deleted from iCloud too, and vice-versa. Alternatively, try uploading to iCloud Drive then you can safely delete it from the iPhone. 

ime160 wrote:

How can I move my files from my iPhone to iCloud

See the following Apple articles:

Sign in and use iCloud.com

https://support.apple.com/en-gb/guide/icloud/mm281e3e7d/icloud

Access and manage your files in iCloud Drive

https://support.apple.com/en-us/HT201104

What does iCloud back up?

https://support.apple.com/en-us/HT207428