I don't known much about Windows driver load mechanism.
Will the driver auto loaded if you inject to $OEM$ folder?
You can test it firstly with a VM(e.g. Vmware/VirtualBox) to make sure that the driver is auto loaded after boot.
If it is not auto loaded, you can inject the driver and the VentoyAutoRun.bat together, and install the driver in the VentoyAutoRun.bat.
Will the driver auto loaded if you inject to $OEM$ folder?
You can test it firstly with a VM(e.g. Vmware/VirtualBox) to make sure that the driver is auto loaded after boot.
If it is not auto loaded, you can inject the driver and the VentoyAutoRun.bat together, and install the driver in the VentoyAutoRun.bat.