Generate boot image from here: https://github.com/kholia/OSX-KVM
With this as a guide for proxmox: https://manjaro.site/how-to-install-macos-big-sur-on-proxmox-ve/
GenSMBIOS, ProperTree, Hackintool are REQUIRED!
Post Install
Use Clover Configurator to mount EFI disk of root and OpenCore install disk. Copy OpenCore install disk EFI files to root efi.
Open config.plist into GenSMBIOS, use the settings there. Use Hackintool to check that en0 is built-in. If not, use ProperTree to edit the plist as described here
