Font Awesome checkboxes

Im trying to change the default wordpress checkboxes within WooCommerce to Font Awesome 5 icons.

Im using the code below which works for Gravity forms and all other occurrences within WordPress except anything within Woocommerce pages and plugins, for example the ‘Accept Terms & Conditions’ checkbox on the checkout page.

/*** custom checkboxes ***/

input[type=checkbox] { display:none !important; } /* to hide the checkbox itself */
input[type=checkbox] + label:before {
  font-family: 'Font Awesome 5 Free' !important;
  display: inline-block;
}

input[type=checkbox] + label:before { content: "\f00d"; font-weight: 900; color: #f45c42; } /* unchecked icon */
input[type=checkbox] + label:before { letter-spacing: 10px; } /* space between checkbox and label */

input[type=checkbox]:checked + label:before { content: "\f00c";     font-weight: 900; color: #bef441; } /* checked icon */
input[type=checkbox]:checked + label:before { letter-spacing: 10px; } /* allow space for check mark */

### WordPress Environment ###

Home URL: https://staging.indycoffee.guide
Site URL: https://staging.indycoffee.guide
WC Version: 3.4.5
Log Directory Writable: ✔
WP Version: 4.9.8
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
WP Cron: ✔
Language: en_GB
External object cache: –

### Server Environment ###

Server Info: Apache
PHP Version: 7.2.10
PHP Post Max Size: 32 MB
PHP Time Limit: -1
PHP Max Input Vars: 1000
cURL Version: 7.29.0
NSS/3.34

### Active Plugins (26) ###

Shield Security: by One Dollar Plugin – 6.9.4
Gravity Forms: by rocketgenius – 2.2.2
WooCommerce added to basket popup (Ajax): by XootiX – 1.3 – Not tested with the active version of WooCommerce
Code Snippets: by Shea Bunge – 2.12.0
Fusion Builder: by ThemeFusion – 1.7
Fusion Core: by ThemeFusion – 3.7
Fusion White Label Branding: by ThemeFusion – 1.1
Gravity Forms Zapier Add-on: by rocketgenius – 1.8.3
iThemes Security Pro: by iThemes – 4.6.1
Logos Showcase: by Carlos Moreira – 1.9.2.1
Max Mega Menu - Pro Addon: by Tom Hemsley – 1.7
Max Mega Menu: by megamenu.com – 2.5.2
Quick Featured Images: by Martin Stehle – 13.3.2
Slider Revolution: by ThemePunch – 5.4.8
WooCommerce Dynamic Pricing & Discounts: by RightPress – 2.2.5 – Not tested with the active version of WooCommerce
WooCommerce Advanced Product Labels: by Jeroen Sormani – 1.1.4 – 1.1.5 is available – Not tested with the active version of WooCommerce
WooCommerce Conditional Shipping and Payments: by SomewhereWarm – 1.3.1 – 1.4.1 is available – Not tested with the active version of WooCommerce
WooCommerce Print Invoice & Delivery Note: by Tyche Softwares – 4.4.3 – Not tested with the active version of WooCommerce
WooCommerce Min/Max Quantities: by WooCommerce – 2.4.1 – 2.4.5 is available – Not tested with the active version of WooCommerce
WooCommerce Pre-Orders: by WooCommerce – 1.5.8 – 1.5.10 is available – Not tested with the active version of WooCommerce
WooCommerce Product Table: by Barn2 Media – 2.2.2
WooCommerce Zapier Integration: by OM4 – 1.7.4
WooCommerce: by Automattic – 3.4.5
WP All Export Pro: by Soflyy – 1.4.7
WP All Import Pro: by Soflyy – 4.4.3
WP Google Map Pro: by flippercode – 5.0.3

### Settings ###

API Enabled: –
Force SSL: –
Currency: GBP (£)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

### WC Pages ###

Shop base: #1179 - /shop/
Basket: #1180 - /basket/
Checkout: #3394 - /checkout/
My account: #1182 - /my-account/
Terms and conditions: #3495 - /returns-refund-policy/

### Theme ###

Name: Avada Child
Version: 1.0.0
Author URL: https://theme-fusion.com
Child Theme: ✔
Parent Theme Name: Avada
Parent Theme Version: 5.7
Parent Theme Author URL: http://themeforest.net/user/ThemeFusion
WooCommerce Support: ✔

### Templates ###

Overrides: Avada/woocommerce/cart/cart.php
Avada/woocommerce/checkout/form-pay.php
Avada/woocommerce/checkout/review-order.php
Avada/woocommerce/checkout/thankyou.php
Avada/woocommerce/loop/loop-start.php
Avada/woocommerce/single-product/add-to-cart/variable.php
Avada/woocommerce/single-product/short-description.php
Avada/woocommerce/single-product/tabs/additional-information.php
Avada/woocommerce/single-product/tabs/description.php

The page I need help with: [log in to see the link]