If, and it is a big "if" there is a cavity tray, it would need to extend around the whole section of the perimeter where the dpc is not at least 150mm above ground level.
External wall DPC should be at least 150mm above finished ground level - a building regulation and warranty standard. regulation.
No air brick should be below ground level. Normally they are 75mm above ground level to the bottom of the air brick.
In your case rainwater can and will seep under your suspended floor and could pool there.
Weep holes should be clear and open not blocked with mortar or screws!