The rail, and thus the rail pressure sensor and rail pressure regulator (the gizmos with the electrical connectors on them at either end of the rail) will be full of debris. You *might* get by with just cleaning the sensor, but the regulator not so much. I replace both. You can clean the rail and blow it clean.
There is an inlet screen to the HPFP, it is part of the inlet line assembly. That little plastic puffy D-shaped thing on the line. That should be replaced.
The injector return line assembly, with its little check valve, should be replaced. This is the thing that clips on to each injector and then returns to the return pipe back to the filter.
ALL the hoses and pipes under the hood need to be removed, thoroughly blown out, and cleaned.
You can gamble on the auxiliary electric fuel pump under the hood. They are actually pretty tough. Still, you'll want to run it backwards and flush clean fuel through it, then run it forwards again, flushing again. Make sure it makes no strange noises. If it makes any sort of irregular grating sound, replace it.
I would for sure replace the lift pump in the tank. And swish a magnet on a string or trimmer line around the inside of the tank to catch all the metal particles in there (obviously only will work for the steel stuff, but that is usually what most of it is anyway).
Blow both the lines from the tank to the underhood area out with compressed air thoroughly, pushing it reverse of its flow. So blue line gets blown from the back forward, black line from under hood to the back. Tie a rag around the end of the line when you do this so you can inspect for any particles. If you see any, do it again.
Then once the engine is running again, plan to replace the fuel filter again in ~100 miles or so, and inspect the bottom of the filter canister for any debris. If you find any, clean out the canister before putting the new filter element back in.
