how to unpack xbl.img (eXtensible Boot Loader ) for poco f6 (peridot)

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I searched existing threads and online but did not find proper guide to unpack/extract xbl.img .I am following this guide to port uefi for my poco f6https://github.com/Project-Silicium/Guides/blob/main/Mu-Qcom/Porting/SoC/SoC.md. I am stuck at getting TimerDxe.efi .please help