Turn off “Low Power Mode” if it's turned on. When your iPhone or iPad is in Low Power Mode”, some iCloud features will be reduced. Go to Settings > Battery and toggle off “Low Power Mode”.
Turn on and off Airplane Mode by going to Settings.
Make sure that you enabled the option to use cellular data for Photos. Go to Settings > Cellular.
Restart your device.
Ensure that you have enough iCloud storage. If you are over your limit, your photos will not be uploaded to iCloud.
Sign out iCloud by going to Settings > Your Name >Scroll Down > Sign Out. You will be asked to enter your Apple ID and password. After this go to Settings > Your Device and Sign in. Do not worry you will not lose any data, your files including photos will be gradually restored again from your iCloud account.
Turn off “Low Power Mode” if it's turned on. When your iPhone or iPad is in Low Power Mode”, some iCloud features will be reduced. Go to Settings > Battery and toggle off “Low Power Mode”.
Turn on and off Airplane Mode by going to Settings.
Make sure that you enabled the option to use cellular data for Photos. Go to Settings > Cellular.
Restart your device.
Ensure that you have enough iCloud storage. If you are over your limit, your photos will not be uploaded to iCloud.
Sign out iCloud by going to Settings > Your Name >Scroll Down > Sign Out. You will be asked to enter your Apple ID and password. After this go to Settings > Your Device and Sign in. Do not worry you will not lose any data, your files including photos will be gradually restored again from your iCloud account.