I doubt, highly, that anything India has done would be anywhere near comparable to either the radar that the F-15J first achieved operationally with, or any improvements/upgrades it’s received since its induction. And, why would they need to hide their capabilities from the QUAD, anyway; aren’t they all allies ‘til the end?It has Indian modifications. India replaced some Russian subsystems within the Bars radar with Indian ones. Since MKI is the backbone of Indian Air Force, it is only natural to expect India try to add something to the radar to make it unique.
Wikipedia -
India was supposed to build both programmable and data processors under project "Vetrivale" to replace the original Russian components, but failed to do so within the required time frame, so MK2 still used the Russian equipment. In 2004, India delivered Vetrivale radar computer based in the i960 architecture.
This was back in 2004. I'm sure the radar has seen many other changes over the 17 years hence.