Needed Help to upload font awesome icons and use it in LWC.

Hi @Muhammad Naveed Nawab

Please check this once 

<template>
    <i class="fa-solid fa-bars"></i>
</template>

JavaScript File:-

import { LightningElement } from 'lwc';
import { loadStyle } from 'lightning/platformResourceLoader';
import Fontawesome from '@salesforce/resourceUrl/BootstapCDN';
export default class PortfolioFooter extends LightningElement {
    renderedCallback() {
        Promise.all([
            loadStyle(this, Fontawesome + '/css/all.css')
            ]).then(() => {
                console.log( 'Files loaded' );
            })
            .catch(error => {
                console.log( error.body.message );
        });
    } 
}

Reference link:-  

Hope this helps  

Thanks