Source of DECT NR+ firmware

Hello,

I’m working with the nRF9151 and testing DECT NR+ functionality. I already have the binary image of the DECT NR+ PHY firmware and it works fine.

I’m just curious—is the source code for this firmware available anywhere, or is it strictly provided as a precompiled binary?
Is there any way to build it manually, or is using the provided image the only option?

Thanks in advance for any info or clarification!

Best regards,
Michal

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