I'm using https://www.npmjs.com/package/cordova-plugin-facebook4 in my app, but this doesn't support windows phone.
I want to know if somebody knows a plugin that supports windows phone.
You'll have to search the web for it, I searched for this "https://www.google.com/search?q=cordova+facebook+plugin+for+windows+phone" and found the following which looks promising (don't forget to also include the inAppBrowser plugin):
This is a JS lib, it is not a plugin. I recall there being a similar JS lib as an alternative, but cannot locate it now...