Does a pod strike automatically necessitate an engine change? Cowlings and potentially nacelle, sure but the whole engine?
It'll be interesting to see, if we ever do find out.
By design the turbine blades have tiny amounts of clearance between their tips and the engine casing.
Even in landing the engines will be spinning with a good amount of momentum, then the pod strike could be strong enough to cause enough jarring and/or deflection of the case or shaft to get contact to happen.
I'm not in the aviation industry so I don't know if on-wing inspection ports provide enough coverage to determine if any of the blades are damaged or not.
I'm not sure if the engines have diagnostics to tell the operators that such damage may have occurred.
If I'm the insurance company or if I'm a Chinese aviation or airport authority I'm going to want plenty of assurances that there is no hidden engine damage.
Same if I'm the pilot doing the first flight or the ferry flight to MRO or to home base.
To me it seems the safest thing to do would be to not fly the engines till they've been torn down.