If you're experiencing difficulty connecting your iPhone to your PC, there are a few steps you can take to troubleshoot the issue:

Assuming you have Windows 10. Download and use iTunes for Windows 10. With iTunes for Windows 10, you can manage your entire media collection in one place. Download and use iTunes for Windows 10

Check the USB cable and ports: Ensure that you're using a certified Lightning to USB cable and try connecting it to different USB ports on your PC. Also, check for any physical damage or debris in the ports that may be preventing a proper connection. Use genuine cable --> Identify counterfeit or uncertified Lightning connector accessories ...

Disconnect all other USB devices from your computer, except for your keyboard and mouse. --> Resolve USB-related alerts in iTunes/Finder - Apple Support

Search for accessories that have completed MFi certification. Once an accessory has completed MFi certification requirements and is reported to Apple as sold/distributed, it will be searchable in our public database of authorized Lightning, headset, charging, iAP-enabled, and Find My network-enabled accessories.

Learn how to identify counterfeit or uncertified Lightning-based accessories.

Restart your iPhone and PC: Sometimes, restarting your devices can resolve temporary connection issues. Restart both your iPhone and your PC, and then try connecting them again.

Restart the device. That's it.

Still not solved --> Force restart iPhone - Apple Support

Make sure that your iPhone is running the latest software versions. On your iPhone, go to Settings > General > Software Update

Update Over-the-Air (OTA) —> Update your iPhone or iPad - Apple Support (IN)

Update using iTunes/Finder —> Update your iPhone, iPad, or iPod touch - Apple Support (IN)

When connecting your iPhone to your PC for the first time, you may need to trust the computer on your iPhone. Unlock your iPhone and check for any prompts asking you to trust the connected computer. Confirm the trust request on your iPhone.

Try a different port, cable, or computer. The issue could be related to your computer, its USB port, or the USB cable connecting it to your device. If possible, try a different computer, USB port, or USB cable. Also, check for any debris in the charging port on the bottom of your iPhone or iPad. --> If your computer doesn't recognize your iPhone, iPad, or iPod ...

Reset your iPhone's settings: If the issue persists, you can try resetting your iPhone's settings. Go to Settings > General > Transfer & Reset > Reset > Reset All Settings. This will not erase your data but will reset your settings to their default values. After the reset, attempt to connect your iPhone to your PC again. Return iPhone settings to their defaults - Apple Support (IN)

If unable to connect --> If iTunes doesn't recognize your iPhone, iPad, or iPod - Apple Support

For your Windows PC —> Troubleshooting issues with iTunes for Windows - Apple Community

Sometimes, third-party security software or firewalls can interfere with the connection between your iPhone and PC. Temporarily disable any security software or firewalls and see if that resolves the issue.

Put your device in recovery mode and set it up again ... Keep your device connected and wait until the Connect to computer screen appears: iPhone ...If you can't update or restore your iPhone or iPod touch

If you are experiencing an issue not listed here, contact support as they can provide specific troubleshooting steps based on your situation.

You can do the following using iTunes :

Following this process is the only way out if your iPhone is disabled. The steps given in this link will help you reset the passcode -> If you forgot the passcode for your iPhone, iPad, or iPod touch, or your ...

Note: If you have forgotten the Screen Time Passcode then restoring your device from a backup after the passcode reset will return the Passcode back to your device. So, please do not restore from a backup.

See how to --> Sync your iPhone, iPad, or iPod using iTunes on your computer ...

Learn how to--> Update your iPhone, iPad, or iPod touch - Apple Support

Here is the process to --> Backup on iTunes.

Microsoft support says (iTunes not required for Import) -->

In the iTunes app on your PC, choose Account > Sign In > Set up and view an iTunes Store account on PC - Apple Support

Organize and play your music and video · Play or download unlimited songs with Apple Music (with a paid subscription) · Find music, movies, TV shows, and audiobooks--> What is iTunes on PC?

In the iTunes app on your PC, choose Account > Sign In, then sign in with your Apple ID. If you don't have an Apple ID, you can create one during setup. Choose Music from the pop-up menu at the top left, then click For You. Click Try it Now, then follow the onscreen instructions. Subscribe to Apple Music using iTunes on a PC