How to override the default USB video

According to the doc, I did a simple demo to verify. My env:

ProductName:		macOS
ProductVersion:		15.5
BuildVersion:		24F74
2.4 GHz 四核Intel Core i5

1. Info.plist:

 <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>IOKitPersonalities</key>
	<dict>
		<key>UVCamera</key>
		<dict>
			<key>CFBundleIdentifierKernel</key>
			<string>com.apple.kpi.iokit</string>
			<key>IOClass</key>
			<string>IOUserService</string>
			<key>IOMatchCategory</key>
			<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
			<key>IOProviderClass</key>
			<string>IOUserResources</string>
			<key>IOResourceMatch</key>
			<string>IOKit</string>
			<key>IOUserClass</key>
			<string>UVCamera</string>
			<key>IOUserServerName</key>
			<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
            <key>IOProbeScore</key>
            <integer>100000</integer>
            <key>idVendor</key>
            <integer>1452</integer>
            <key>idProduct</key>
            <integer>34068</integer>
		</dict>
	</dict>
	<key>OSBundleUsageDescription</key>
	<string></string>
</dict>
</plist>

1. UVCamera.cpp

//
//  UVCamera.cpp
//  UVCamera
//
//  Created by DTEN on 2025/6/12.
//

#include <os/log.h>

#include <DriverKit/IOUserServer.h>
#include <DriverKit/IOLib.h>

#include "UVCamera.h"

kern_return_t
IMPL(UVCamera, Start)
{
    kern_return_t ret;
    ret = Start(provider, SUPERDISPATCH);
    os_log(OS_LOG_DEFAULT, "Hello World");
    return ret;
}

1. UVCamera.iig

//
//  UVCamera.iig
//  UVCamera
//
//  Created by DTEN on 2025/6/12.
//

#ifndef UVCamera_h
#define UVCamera_h

#include <Availability.h>
#include <DriverKit/IOService.iig>

class UVCamera: public IOService
{
public:
    virtual kern_return_t
    Start(IOService * provider) override;
};

#endif /* UVCamera_h */

1. Then I build by xcode and mv it to /Library/DriverExtensions:

sudo mv com.lqs.MyVirtualCam.UVCamera.dext /Library/DriverExtensions

sudo kmutil install -R / -r /Library/DriverExtensions
kmutil rebuild done

However，the dext can't be loaded:

 kmutil showloaded --list-only | grep UVCamera
No variant specified, falling back to release

What's the problem? anyone can help me?