In a building survey with an architect/structural engineer/expert for damage to buildings, it must be clarified where the cause of this crack formation is to be found. If it is a multi-layer masonry: double-layered, with a cavity joint and facing brick or with a prefabricated brick shell and an air space in between as protection against driving rain - probably in your region - it can be that the prefabricated shell has partially come loose. However, it can also be due to overloading or a subsequent structurally effective intervention in the area of the ceilings/ceiling beams/roof structure. These are only initial assumptions that must be verified by a building condition analysis.
In addition, there is probably a relatively vapor-tight façade coating that has led to moisture accumulation in the bricks and to frost damage. The bricks were presumably fired too unevenly and at the damage sites are too soft, too capillary-absorbent, and basically unsuitable as a material for a visible façade.
I recommend that you first invite an expert for masonry damage via the responsible chamber of crafts to a site inspection and discuss with him, if necessary, the need for the involvement of further specialists, e.g. the structural engineer.
Under no circumstances should you commission a craftsman company with an uncoordinated measure without careful analysis. You should also refrain from wanting to repair the cracks yourself. This is the task of a specialist company, according to a remediation concept then available from the expert/planner.
I would be very happy to receive an answer. Best regards