icloud photo Synced is not showing
The message is self explanatory. iCloud for photos syncing is "on". You should access the photos using iCloud for Windows and iPhone's Photos.app. 


https://support.apple.com/en-us/HT204283
https://www.microsoft.com/en-us/p/icloud/9pktq5699m62?activetab=pivot:overviewtab


See these for more info. 


https://support.apple.com/en-in/HT205323
How to download orginal photos from iCloud Photo Library to PC?