Well, maybe someone will disagree and give me a red square and not print his name to it, but here goes. ha. ha.
I have to agree with Richard in his last post.
Not being in the Texas area and accustom to the building techniques, I would have to say that this was a slab on grade and when it was poured at the finish floor elevation, the entrance porch slab was not considered.
What you see in the picture, or at least what I see, is the slab edge having been chipped away to provide a nesting place for the 1 course of brick below the finish floor.
I have to assume the since the weep holes are present at the lower elevation, the same weep holes exist on the finish floor elevation.
The parging that everyone is thinking about is basically the mortar wash to hide the chipping since it was not cut like it should of been.
I would imagine that in the Texas Area, they would have provided a bond breaker between the slab of the entrance and the foundation to provide for the natural thermal expansion.
Shoddy workmanship for a new house.
Assuming that the brick flashing was installed on the higher portion of the slab, wicking under the flashing could occur and find it’s way to the interior.
Flashing should always be installed down 1 brick from finish elevation for that purpose.
Hope this helps.