Dude, we are not expecting NATO radars to communicate with J10CE. BAF has REL-4/M, JH-16 radars.
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BAF always had a mix of Western and Chinese sensors and it knew they cannot communicate with each other due to different standards. They started working to solve this problem since 2019. They talked to different OEMs of radars for specialized interfacing equipment and developed a customised air defense system integration architecture from UK Artemis that supports both Chinese and NATO standards independently and then fuse the data to generate a complete air picture. (So Chinese and NATO system really don't have to talk to each other directly)
This air defense system integration (ADSI) entered service last year. And it is not a service specific system either. It has the ability to integrate sensors and air defense data from army and navy air defense systems also.
Dude, BAF isn't buying J10C or Eurofighter as stand-alone system. BAF chief simultaneously talks about acquiring long range air defense radars, MRSAM, EW, UAS, C-UAS along with fighter jets. I have posted them in this thread several times already.