Flashing Between Siding And Brick

It might be buried behind the siding where you can t see it.
Flashing between siding and brick. Details like this risk rot and insect damage to the structure. 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. My detail only shows how it should be capped and flashed if you do build it as shown.
The metal flashing placed on wall top slopes back towards the building directing water inside the structure. But the j cap also creates a consistent line. Transition from brick to siding. Yes the proper detail is to fur out the siding over the face of the brick with at least a 4 overlap.
Maybe in this case the flashing extends upwards behind the building siding forming a zee shape that might reduce this risk. Each time you transition between materials say foundation siding brick windows doors etc.