Rafale has the ability to guide MICA without radar emission with its Front Sector Optronics (FSO). IRST alone cannot generate fire control solution as they cannot measure distance. French cleverly introduced a laser range finder in Rafale's FSO. So FSO is actually more than simple IRST present on other 4th gen aircrafts. Which enables it to generate fire control system solution upto 40km (maximum range of the laser range finder) this is barely BVR.
What USAF has for sometime is gen next stuff.
IRST Legion POD feature world class sensor and more importantly advanced data link that enables it to connect with other legion pod flown in the formation. So it is actually able to triangulate target's precise 3D location by collaborating with other legion pods and generate passive fire control data. More importantly, not limited by any laser range finder. And able to provide weapon quality track at 50nm in optimal condition. USN super Hornets also has similar capability.
French might introduce this capability with Rafale F 4.3 iteration as well as true collaborative engagement as they planned enhanced sensor fusion and an indigenous intra-flight high bandwidth secure data link. Then you might see two IRST sensors on two Rafale working in similar fashion and not limited by laser range finder.
However, with existing Link 16, Rafale is not there yet.