Not closely related but you should revise some options you have set in GTM4WP:
* Cart as 1st step: this is needed in some special cases, I wouldn’t turn this on unless you are willing to see the cart page as the first step of the checkout funnel
* Use SKU instead of ID: it might be required if you are using a feed plugin that includes the product SKU as product ID instead of the internal ID. Otherwise this option is not mandatory to be set
* Do not flag orders… : once you manage to track orders, this option turned on will send the same order multiple times if your customer revisits the same order received page. I would keep this turned off.
On this screenshot:
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You have an event called “page_view”. This is not generated by GTM nor GTM4WP. It might be related to your Google Ads plugins. If you are using GTM, you can fire your Google Ads conversion and remarketing tags within GTM, no other plugin is necessary.
You seem to have multiple payment gateways on your site. Are you sure that all gateways force the user to be redirected to your webshop with the need of the user to click on a “back to merchant” button?
Can I somehow place an order and use one of these without the need to use any real back card data? Do any public test card numbers exists for your payment gateways?