Unable to pair Magic Keyboard with my Dell laptop

what AI says

"Yes, the Apple Magic Keyboard Model A1843 can be paired with a Windows PC. It uses Bluetooth for connectivity, so you'll need to enable Bluetooth on your PC and put the keyboard into pairing mode. 

Here's how to pair it:

1. 1. Enable Bluetooth on your PC:
2. Go to Settings > Devices > Bluetooth & other devices (or similar, depending on your Windows version) and ensure Bluetooth is turned on. 
3. 2. Put the keyboard in pairing mode:
4. If the keyboard is already paired with another device, turn it off and then back on to initiate pairing mode. You should see a green light flashing on the keyboard. 
5. 3. Add the device on your PC:
6. Click "Add Bluetooth or other device" and then select "Bluetooth". 
7. 4. Select the Magic Keyboard:
8. Your PC should detect the Magic Keyboard. Select it from the list of devices. 
9. 5. Pairing:
10. If you're prompted for a passcode, Windows will display it. Type the passcode on the Magic Keyboard and press Enter. If it's a newer Magic Keyboard, you might just need to click "Connect" or "Yes" after the code is generated. 
11. 6. Finalize the connection:
12. Windows will finalize the setup, and you should be able to use the keyboard. 

Important notes:

• The Magic Keyboard only supports Bluetooth connections, not a wired connection. 
• If you encounter issues, try restarting both the keyboard and your PC, and make sure the Bluetooth drivers on your PC are up to date. 
• You may need to update your Bluetooth drivers if you encounter connection problems according to a user on Stack Exchange. 
• You can find the Apple Wireless Keyboard option under the Bluetooth devices menu. 
• Some key functions might differ between macOS and Windows, but basic typing should work. 

"

from

Magic keyboard Model A1843 pair with windows pc - Google-

Magic Keyboard with Numeric Keypad - Technical Specifications - Apple Support

System Requirements

• Bluetooth-enabled Mac computer with macOS 10.12.4 or later
• iOS devices with iOS 10.3 or later

Set up your Magic Keyboard, Magic Mouse, or Magic Trackpad with your Mac - Apple Support

With a Mac or iPhone, making a wired connection to the keyboard

• Recharges the batteries in the keyboard
• Lets you use the keyboard as a wired keyboard
• Automatically pairs the keyboard with the computer

That's why there's no separate pairing button. I would guess that the recharging and wired keyboard functions work with a Windows PC because they operate in a very generic USB way. The automatic pairing bit likely is not something that Windows would know is needed, or would know how to do.