Hackintosh user here: this has literally no impact on anything.
If you turn off SIP, you can run unsigned kernel extensions without issue, both on a Hackintosh and on a real Mac†.
If you're a Hackintosh user, but for some strange reason you want to leave SIP enabled, you can inject unsigned kernel extensions via the Clover bootloader. (I think you may need to temporarily disable SIP during setup or something like that, I don't fully remember. I just turn SIP off.)
† I actually find this much easier than Windows, which is a royal pain in the neck if you want to install unsigned drivers.
I mean, if you want SIP, you can leave it fully enabled and load all custom kernel extensions with Clover, as I mentioned.
As I see it, if you're the kind of user who's installing Hackintosh, you're also probably savvy enough to not grant root permission to just any software. I want to have full control over my computer.
Does csrutil status not give you the "This is an unsupported configuration, likely to break in the future and leave your machine in an unknown state." warning?
Kernel extension already require a special developer certificate. You should explain to Apple what you need it for, then if your are accepted by Apple you get a new signing certificate including kernel Extensions. After that you can do "anything".
With the notarized every app will be needed to be scan by Apple before. It's something a lot more painful than Microsoft Windows Defender which do the same (first launch of unknown app) for every app and maintained a worldwide database of signature of authorised apps.
