Using a metal j flashing between these types of transitions provides a barrier between siding and transitions that protects against water intrusion.
Flashing between siding and brick.
In your case there is a great need for a flashing that runs along the top of any of the horizontal fascia boards.
There should already be a metal flashing that is sealed to the brick.
Yes the proper detail is to fur out the siding over the face of the brick with at least a 4 overlap.
It might be buried behind the siding where you can t see it.
Maybe in this case the flashing extends upwards behind the building siding forming a zee shape that might reduce this risk.
My detail only shows how it should be capped and flashed if you do build it as shown.
Each time you transition between materials say foundation siding brick windows doors etc.
Flashing between brick and siding is a relatively similar process on all types of brick to siding transitions although there may be slight variations based on manufacturer recommendations.
Transition from brick to siding.
The metal flashing placed on wall top slopes back towards the building directing water inside the structure.