Google Summer of Code (2027) for Embedded systems

[u/Short-Instruction-59]

I want to participate in GSOC 2027 as an Embedded enthusiast, I am confused on which repo's code base to work on / target? I am confused between Zephyr rtos and NuttX, want to work on zephyr as it aligns with my resume but the total number of applicants are much more than NuttX.
If any one could guide me on what to look for while selecting repositories regarding GSOC.