Payment integration on WordPress with an external service (bypassing high-risk payment gateways)

I need to implement a solution that will help automate the payment acceptance process for my business (a sports betting service). This relates to a high-risk industry, and I find it very difficult to find a suitable payment gateway that will accept me. I have already spent a lot of time exploring different options.

Recently, I found a website that gave me an idea of how to implement the required scheme. An example is https://paygate.to/payment-link/. There, you can enter the amount, the customer's email, and select the currency. After that, a payment link is generated, and the customer can pay in a convenient way (in this case — cryptocurrency, but I do not want to use crypto). The source code of the solution is also available on GitHub: https://github.com/paygate-to/payment-link-generator.

What needs to be done:

• Link the checkout form field on my WordPress (WooCommerce) website with an external site where the actual payment is made (for example, a site for purchasing Nike gift cards, where I have an account).

• The customer enters data on my site, then the data is automatically inserted into the external payment form (gift card, third-party service, etc.), and the customer pays directly on that site.

• After payment, it is necessary to somehow check the payment status and display it to the customer. Possibly via iframe on a custom "Thank you for your order" page (I have detailed this step in a PDF that I can send).

• I do not control the external site where the data is sent, so a highly universal integration is needed (automatic data transfer from WooCommerce checkout to the external form).

• In WooCommerce, it is temporarily possible to use the "Cash on Delivery" payment method, simply renaming it to a more neutral name so that the customer does not realize that they are essentially paying for a gift card or something similar.

Important points:

• I do not want to use crypto processors if possible.

• If necessary, the data from checkout (email, amount in GBP) should automatically be inserted into the payment link, and this link should be displayed on the thank you page.

• I will send a PDF with a description of how the scheme should work.

Questions for the freelancer:

1. Do you understand what task I want to implement?

2. Will you be able to do this?

3. How easy is it to integrate such logic with WordPress (WooCommerce)?

4. How long will the implementation take?

Please describe your experience with similar integrations and suggest implementation options.
I will send a PDF with details after discussion.