It's a BVR missile with a radar seeker, so requires a radar to use it and as I always say, it's capability that counts, not origin. We can't afford to use low capable missiles only to please some pride reasons!
The upgraded M2Ks, will have the additional fuselage hardpoint stations, which will be used for MICA missiles, but in between them is the gear bay, which means any payload at this hardpoints has lenght limitations.
MICA lenght: 3.10m
Astra lenght: 3.57m
Also Astra was developed as a replacement for R27 and R77 missiles on the Mig 29s and MKIs, or LCA/Mig 29K, but it seems that Astra MK1 didn't met the goals, additional R27s and Derby for LCA were procured.
That was Israeli PR at Aero India, not based on IAF or IN orders, so far no Indian official had confirmed it and IAF seems to be happy with the R73. Another reason why Python V and HMS for Jags is such a waste.