The EFI like the heading of post states is for Big Sur and Monterey. Make sure you use all the latest versions of any kexts you are adding and use agdpmod=ignore not pikera. These boot arguments are WEG related not OpenCore and will always be needed with WEG and a Navi, big Navi GPU. What you can actually do is disable WhateverGreen and remove any WEG related arguments and use your BigNavi totally natively, Your find it works better that way.
Unofficial open source Intel Wireless projects for macOS - OpenIntelWireless
github.com
And most importantly, DON’T TRY AND CARRY ACROSS YOUR OLD CONFIG.PLIST. USE THE SUPPLIED ONE AND EDIT TO HOW YOU NEED IT.