Before V1, you reject.
After V1, you do the engine out procedure and return to the airport.
All passenger certified twins will follow those guidelines as far as I know.
ATR72-600 meets all requirements for one engine climbout.
It can climb to and maintain FL110 with one engine.
Does it have a RAT (ram air turbine) to generate a minimum amount of electricity to power the control surfaces?
If so, they could have trimmed for best glide and taken it right to the river with a better landing than what they did.
Unless they got behind the minimum controllable airspeed, critical engine out.
It may have a service ceiling of 11,000MSL on one engine, but that's not on takeoff, and possibly at max gross weight.
The planes might, but do the pilots have to deal with tricky climbout patterns in airports in that country ?
What I am saying is that the certification is based on some set parameters. You can put the plane in a position where it cannot recover quickly enough to gain enough airspeed to keep flying.