What I can do when I lose my Apple Homekit QR code

I’m using yeelink light, but I lost the QR code for connecting to Apple Homekit. It’s been connected to the Yeelight app normally, but I want to connect to the Apple Home app. I pressed the ‘Add to Home’ button on the Yeelight App, but the Apple Home App shows the QR code scan screen as before. Is there a way to connect the Apple Home App without QR code? Or can I get a QR code reissued?