It might be buried behind the siding where you can t see it.
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.
My detail only shows how it should be capped and flashed if you do build it as shown.
You need to make sure each material sheds water over the top of the material below without getting behind or under the materials.
Details like this risk rot and insect damage to the structure.
Yes the proper detail is to fur out the siding over the face of the brick with at least a 4 overlap.
There should already be a metal flashing that is sealed to the brick.
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.
Using a metal j flashing between these types of transitions provides a barrier between siding and transitions that protects against water intrusion.
The metal flashing placed on wall top slopes back towards the building directing water inside the structure.