Can someone tell me how to make nfc plugin work in Outsystems? is there any sample to test if this thing work?

Yes... it work well.  Include the NfcPlugin as a dependency to your mobile app.

Here is a sample that a user posted... that I tested to ensure it was working.  I tested this with NFC Tags.

Once a tag is scanned a tone will sound and a message will show.  If the tag has a value, that value will be written to the screen.