Is there a wordpress plugin for live NOTAMs?
As mentioned, this is off-topic and more related to understanding APIs and Wordpress plug-ins.

If you want a place to start:
https://developer.laminardata.aero/documentation/notamdata might give you API access, but you'll have to build it yourself which is beyond the scope of this site.

As @Zach Lipton mentioned in the comments, even the official sites have a disclaimer, but here are a couple official sites you could check out:


https://notams.aim.faa.gov/notamSearch/nsapp.html#/
https://www.notams.faa.gov/dinsQueryWeb/


Somewhat related: Is there a Flights API to get flight information months in advance?