How To Manually Upload Photos to OneDrive on iOS
Use the OneDrive app to upload photos and videos from your device, create new folders, and move photos and videos from one OneDrive folder to another.
To upload files and folders with the OneDrive for iOS app
In the OneDrive app, tap 
at the top of the screen.
Then tap to Take a photo, Scan a document, Create a folder or Upload a file or photo.
Notes:
If you choose Take a Photo, your device's camera app opens. You might be asked if you want OneDrive to access your camera - tap Yes to allow your pictures to be saved in OneDrive.
If you tap Choose Existing, links appear to the Photos app on your device. Browse to the pictures you want to upload, select them, then on the top bar, tap Done.