There can be several apartments on one phase, but the phase must be distributed over several apartments in the switchboard, for each the apartment must be installed with a separate circuit breaker at the same rating as set by the representatives power grids. One wire goes to each machine, it can branch off to another machine. There is one wire per apartment from each individual machine.
But it is specifically in your case that it is not entirely clear what the speech is about. An automatic machine for 25 A, several aluminum wires are connected to it - from this photo it is not clear what they are feeding, where they are going. But in any case, one 25 A machine cannot power several apartments, only one.
I repeat once again - at the exit from the machine there should be one wire for one apartment, at the entrance of the machine it can there should be several wires - if in this way a branch of the wire is carried out to other machines in the dashboard.
Most likely, these 4 machines feed 4 apartments - each apartment has its own machine. If this is not the case, then you need a separate automatic machine for each apartment.
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