Yes, I know you know. After you set SIP in OCLP > Settings, Build and Install Open Core (OC is not updated until you do this), reboot, Reset NVRAM and then launch macOS.Yes, I know it. OCLP > Settings not the looking I for. I tried a couple of settings to there, e.g., I set the SIP to 0x0, which is enabling to the SIP. But when I look under the NVRAM with Terminal SIP still shows disabled. And, yes I reset the NVRAM. Still, the settings here are not what I'm looking for. I want OpenCore to not completely interfere with SIP.
EDIT: Make sure you have only one instance of OC EFI installed in your system so you know you're booting with the updated version of OC EFI.
EDIT2: If you don't want to risk the possibility that you can't boot after you make changes, Build and Install Open Core (with your desired SIP) to a USB thumb drive and test your new OC EFI by booting from the thumb drive.