Hiii

As of now, there has been no information about the date extension of CODE GENERATION.  Also the final registration is to start in 2 days, as far as i know, there would not be any possibility of extension. The last date was 17th february and the authorities had provided ample time for code generation.
Unfortunately if you havent generated the code, you can not proceed to further application process and appearing in the entrance. You can waot for the next year or go for NEET and JIPMER.

All the best
Thanks!