If you know that the engine rotates, check the oil pressure. If you have a broken timing belt on the passenger side, the oil pump does not rotate. Zero oil pressure on the gauge and the engine cranks over with little resistance.
Oil pump is driven by DRIVERS side belt. (For LHD) Same as the disty.
Smart cause you don't want the engine running with the oil pump not spinning......and they can run with no passenger side belt.
This is a broken timing belt. Can tell by the sound