Do you routinely operate with a PAPI when there is a displaced threshold?
Yes, it usually does have a PAPI.
However the PAPI is useless if in IMC.
Look out the window and land the damn airplane. Pretty simple....
Not so damn simple in IMC
The published intrument approach profile (FMS/FMC/FMGC profile) is also useless for a temporarily displaced threshold.
If I follow the published profile, it means I will see 4 reds when when I get visual at the minima, and possibly not meet the company requirements to be stable and able to continue the approach.
If it happens to be at night (below slope at minima), you will not meet the requirements to make a visual approach therefore you will have to go around/execute a missed approach.