Hi,
this is a simple application which shows a communication between a Lin Master and a Lin Slave of both Lpuart Ip and Flexio Ip. As example does communication between LIN Master/Slave on the board, you should connect J23.7 to J23.8 and place either J20 or J24 jumper. Then 2 LIN frames should be visible on this LIN bus connection after example running. This is what you should get

Note in example just 2 frames are sent and then main function is leaved. You can try to add some endless while so frame will be sent still.
BR, Petr