Continuing a "stopped" iCloud restore on iOS

Continuing a "stopped" iCloud restore on iOS

I was restoring my iPhone 5 to the latest iOS and chose restore via
iCloud. The restore process - especially for apps - was frustratingly slow
and actually stopped frozen after a while.
After trying several other options, I finally "Cancelled" the iCloud
Restore operation and then manually installed the apps via iTunes, as well
as synced songs, etc.
Now for some of the apps, data is missing and my Photos also appear to be
incomplete. Since I "cancelled" the iCloud Restore (and was warned about
not being able to do this again), is there any way at all I can coax
iCloud into streaming the app data back into the installed app folders, as
well as getting my photos? Would there perhaps be two separate ways of
doing that?
Or is the only other option to "Erase Content and Settings" and do the
restore process all over again, allowing Photos to restore gradually via
iCloud, while installing apps via iTunes parallely (without "Cancelling"
the iCloud restore)?
If the answer to the last question is "Sadly, yes", then can it be assumed
that if the app is installed via iTunes anyway, iOS will proceed to
restore the app's data from iCloud? Or does the app HAVE to be installed
OTA for the data to also be restored from iCloud?
Thanks.
,Dev