Hi,
Officially, the third party Keil, IAR supports LCPXpresso54608, NXP tools MCUXPresso tools supports LCPXpresso54608 with free of charge.
For Arduino, pls try to use Auduino IDE from the link:
https://www.arduino.cc/en/software
I suppose that you can use embed tools from the link:
https://os.mbed.com/
Hope it can help you
BR
XiangJun Rong