I'm not an expert on the PN7462 (they come out of our NFC group rather than MCU group) - but I've seen debug issues with the PN7462 board when it wasn't powered correctly. Make sure you read the board's user manual about power and certainly don't try powering it from the LPC-Link2 itself.
If that doesn't help, please post the text from debug log from the IDE's console view after a failed debug connection. Details of how to do this can be found in section 14.7, "The Console View", of the MCUXpresso IDE v10.0.0 User Guide.
Regards,
MCUXpresso IDE Support