Perfectly normal; you can't install Ventura without a supported SMBIOS; same goes for OTA updates.
Once Ventura is installed, revert to Haswell SMBIOS and boot with -no_compat_check boot arg. Then apply the OCLP root patches.
You'll need to:
disable SIP. Just change csr-active-config to 03080000
Add this to bootarg as well amfi_get_out_of_my_way=0x1
On reboot, reset NVRam
Download OCLP 0.5.x
Selected "Post Install Root Patch" -> Start Root Patches
Rebooted system - > full graphics acceleration