One plugin supports GA4 and Adwords:

Google Analytics 4 (GA4) Plugin for Google Tag Manager
Google Enhanced Conversions
Ads (Adwords) Conversion Tracking
Ads Dynamic Remarketing

Google Analytics 4 (GA4) is a free tool for tracking visits to websites and apps.
This plugin facilitates event tracking by sending events to Google Tag Manager (GTM) and adds JavaScript scripts to the frontend.

Enhanced conversions is a feature in Google Analytics that can improve the accuracy of your conversion measurement and unlock more powerful bidding in Google Ads.

Ads Conversion tracking is a free tool that shows you what happens after a customer interacts with your ads -- whether they purchased a product, signed up for your newsletter, called your business, or downloaded your app. 

Dynamic remarketing is a Google Ads feature that shows customized ads to people who have previously visited a website

We also offer the plugin that sends events directly to GA4 in background mode (GA4 Server Side).
This is advantageous because users can block tracking scripts in their browsers.

Features GA4:

• Send a wide range of events to GTM, including:
  view_item, view_item_list, select_item, add_to_wishlist, add_to_cart, view_cart, remove_from_cart, begin_checkout, add_payment_info, add_shipping_info, search, purchase, refund, login, sign_up

• Utilize the Measurement Protocol for customers using ad blockers

• Send detailed information about products, including category (item_category) and manufacturer (item_brand) and item_list_name

• Configure the revenue value sent to GA, choosing from order total, subtotal, or profit

• Customize the transaction key (Order ID, Order Number)

• Specify the product key (ID, SKU, GTIN, and Manufacturer Part Number)

• Support for multiple currencies

• Optimized for speed; experience similar page load times with and without the plugin

• Full detailed information about the product (price, category, manufacturer, etc.)

• The information about the list of items (the parameter item_list_name)

• Support Ajax (add events if the page loads list of products with Ajax)

Example:

dataLayer.push({
    'event': 'view_item_list',
    'ecommerce': {
    'currency': 'USD',
    'items': [{
          'item_name': 'Samsung Series 9 NP900X4C Premium Ultrabook',
          'item_id': '6',
          'price': 1590.00,
          'item_brand': 'Samsung',
          'item_category': 'Notebooks',
          'item_list_name': 'Category page',
          'productId': 6
        }]
    }
});

dataLayer.push({
'event': 'purchase',
'ecommerce': {
  'transaction_id': '2070',
'currency': 'USD',
  'affiliation': '0',
  'value': 399.60,
  'tax': 39.60,
  'shipping': 0.00,  'payment_type': 'Payments.CheckMoneyOrder',
'items': [{
  'item_name': 'HTC One Mini Blue',
  'item_id': '19',
  'price': 100.00,
  'item_category': 'Cell phones',
  'quantity': 4,
  'productId': 19
}]
}
});

Features Enhanced Conversions:

• you could add the event for all pages or for the order completed page
• the user_date is encoded

Example:

gtag('set', 'user_data', {
'sha256_email_address': '51BC84A067A1DC6E3A6E66A3BB4A8342CB286AEAC84E510A67113489D09593FA',
'sha256_phone_number': '53F476A09BD7894C18C7C6982EF786647754A674F92F6F5CDFF17C3E66769B12',
'address': {
'sha256_first_name': '10B66E2BD553D4F4EDA3427D4988A830C60860A8A025F7DBB7E61CC75D7F63A8',
'sha256_last_name': 'CF072748DE586DEE9BBA4E3287857499BCF99C459C1CCE2AD3D2B9AC3091F80A',
'street': '1458 Rosestreet',
'city': 'NewJork',
'region': 'NY',
'country': 'US',
'postal_code': '10021'
}
});

Features Ads (Adwords) Conversion Tracking:

• You could configure the conversation for the events "purhase", "view_product", "view_cart", "signup"

• Configure the revenue value sent to GA, (order total, exclude TAX, exclude shipping fee)

• Customize the transaction key (Order ID, Order Number)

• Support for multiple currencies

• Optimized for speed; experience similar page load times with and without the plugin

Example:

gtag('event', 'conversion', {
'send_to': 'AW-777777/asdasdasd',
'value': 399.60,
'currency': 'USD',
'transaction_id': '2070'
});

Features Ads Dynamic Remarketing:

• You could configure the conversation for the events "purhase", "view_product", "add_to_cart"

• Configure the revenue value sent to GA, (order total, exclude TAX, exclude shipping fee)

• Specify the product key (ID, SKU, GTIN, and Manufacturer Part Number)

• Support for multiple currencies

• Optimized for speed; experience similar page load times with and without the plugin

Example:

gtag('event', 'purchase', {
'value': 399.60,
'items': [
{
'id': '19',
'google_business_vertical': 'retail'
}
]
});

Note:

The unregistered version includes a 15-day trial period, allowing you to try it before purchasing.

Compatibility:
Compatible with NopCommerce versions 4.80, 4.70, 4.60, 4.50, 4.40, 4.30, 4.20, and 4.10. Interested in a plugin for older versions?

How to install and configure the plug-in.