Hi, @SGZest . Welcome to the Community. Thanks for reaching out about this.
The third party payment gateways that are integrated with the Shopify platform are available regionally, and are all listed by countryhere. In order to have a new third party payment gateway integrated with Shopify that isn’t already listed there, the payment company would need to contact Shopify and request it themselves. However, at this time, applications are no longer being accepted. Alternatively, if the third party gateway has an integration with Shopify from their end, you may be able to connect your store with it that way. Have you contacted Barclays Smartpay Fuse directly to see about this?
If there are no external integrations that you can use, what I can do for you right now, is submit a feature request for this to our developers on your behalf. Therefore, could you please let me know the following, and I’d be happy to send your feedback along:
Where are you located?
Why do you wish to use Barclays Smartpay Fuse specifically?