The Ledger Live mobile app allows a user to scan a QR code displayed on another device, but this does not give the user a way to connect to an app from a browser on the same device.
When the user initiates the Walletconnect flow from the target app, the user gets a QR code to scan OR the ability to copy a code. Most other wallets allow the option to either scan or paste that code to establish the connection but the Ledger Live mobile app does not.