Such tools exist.
Never seen the animations for the Concorde crash, or the one for the "Hudson glider"?
Beyond recreated animations, it might be desirable to take specific FDR data and input it into a FFS to duplicate a particular profile to completion or to some point where thereafter pilot freeplay inputs could be made. Right now my understanding is that all the data parameters required to drive the FFS may not necessarily be available in the FDR. If they were, the specific data point frequency in the FDR may not be the same as the FFS, but the associated computations in an FFS between FDR data points could be interpolated.
The knowledgeable people I’ve talked to say even if all the data necessary to drive the FFS were available, the setup process would still take months.