Hi @Kunal_Gettobyte,
- The JN5189 is supported by PEMicros's debuggers and in-circuit programming tools. Here you can find the device information and programming algorithm for internal flash programming.
You can also look into this guide to debug utilizing PEMicros' tools and MCUXpresso.
- Yes, the MCU Link debugger is compatible with the SWD connections.
Another option is the flash programmer tool, please look into this getting started guide to locate the flash programmer installer.
I hope you find this helpful!
Best regards, Julián