GSF (secondary source for yaw alignment)

So I was trying this new feature of GSF on my custom built FC that works on STM32 as a secondary source for yaw in case I want to change my yaw source from mag to GSF in case of any emergency.
I was working on firmware 4.1.4.
But I was unable to find few parameters in my parameter list
AM’I missing something like a parameter on which these parameter are depended like a GSF enable or something.
please help me out

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I am facing the same problem.