so it looks like all 212 photos and videos are not stored locally on your phone and the iXpand app is having and issue connecting to iCloud to get the vids and pics. Since you could get 12 photos that is likely what is stored locally and the other 200 are on a different device and icloud.
You can try downloading them if you have enough free space for them on your phone. If not, do you know what device the other 212 pics and vids are on? if you turn off icloud photo library they should still be available on that device. Also you can log into iCloud and they should be available there.
