No you cannot blindly connect all 4 supplies ganged together and expect rated performance with any load.
Current sharing can be active or passive. They support the 2 module active current share using the signal on pin 8 to be compared with internal current sense so that parallel current share is kept within 2% of total rated current. This is not possible with 4 modules.
Passive current sharing is when you have no active feedback for sharing current and rely only on the matching of voltage divided by wire resistance from source to dynamic load to determine the current share.
The challenge is to define load regulation error and current share imbalance which are tradeoffs.
The following shows an imbalance in average output impedance and voltage mismatching on current sharing errors.
0.4% or 20 mV max @ 25 A , 48V means ESR = 20mV/25A = 0.8 mΩ
However if the voltage error was nulled then drifted to 5mV or 0.1% with no load the parallel supplies now share an ESR`= 1.6 mΩ (=2x 0.8 mΩ)
Thus a hypothetically mismatched circulation current occurs at 1mV/1.6mΩ = 0.625A per mV of error.
e.g. a 0.4% voltage error or 20mV difference results in a 28% current sharing imbalance and a system failure.
Obviously System Specs need to be defined and then stability assumptions not mentioned to verified at worst case loads. Current sharing causes disturbances in each others active voltage regulation and current sharing, both which can cause instability or actually unstable oscillation and system fault.