Mannion was released by City in July after his contract expired.
The 22-year-old spent four years at the KCOM Stadium but failed to make the grade.
He featured just once at senior level. That was in the EFL Cup against Doncaster Rovers, a game that ended in a 2-0 defeat in August 2017.He has now found a new club and has branched out by moving abroad to join Cypriot side Pafos FC, following his release.
He has joined fellow English players Jason Puncheon and Rushian Hepburn-Murphy.