How to import a JS UMD module with Laravel Mix Webpack ?

I have a JS plugin with the following structure :

(function(global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
		typeof define === 'function' && define.amd ? define(factory) :
		(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.myPlugin = factory());
}(this, function() {
	'use strict';

	/**/
	const myPlugin = (function(options) {
        const api = {};
        return api;
    });

	return myPlugin ;
}));

I'm trying to load this plugin inside the app.js file created by Laravel mix. To do so, in app.js I have the following :

try {
	window.myPlugin = require('./app/plugins/myplugin.js');
} catch (e) {}

Now, the file is actually imported inside app.js, but when I try to use myPlugin within another JS file, I get the error myPlugin is not a function

const pluginVar = myPlugin(options);
//myPlugin is not a function

If I try to console.log(typeof myPlugin) I get Object.