The metal flashing placed on wall top slopes back towards the building directing water inside the structure.
Flashing between siding and brick.
Each time you transition between materials say foundation siding brick windows doors etc.
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.
It might be buried behind the siding where you can t see it.
Using a metal j flashing between these types of transitions provides a barrier between siding and transitions that protects against water intrusion.
Details like this risk rot and insect damage to the structure.
You need to make sure each material sheds water over the top of the material below without getting behind or under the materials.
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.
Yes the proper detail is to fur out the siding over the face of the brick with at least a 4 overlap.
In your case there is a great need for a flashing that runs along the top of any of the horizontal fascia boards.