I'm pretty confident those black diamonds are EO apertures. That is the same location the F-35's side facing EODAS apertures are placed as well.
And tbh I've never heard of a fighter with vents for their radars before. I don't know if a GaN AESA would even need a vent of any kind.
All high performance avionics require venting due to heat, and the F-35 uses fuel as a heat sink to kool the avionics? There are two enemies of electronics, heat and moisture, so as to a direct vent??? It may well be ducted from a high pressure area aft and vented to a low pressure area?