Hello @Andreas Georgsson - Thanks for posting on MS Q&A!
It sounds like the initial attempt failed due to service-related issues and left the resource creation process in such a state where you can't use the "SwishQRCode" name anymore -- if you must use this exact name/location pair in your project & need the underlying service related issue resolved, please open a support ticket and work with a service engineer who has deeper insights into your environment to troubleshoot the root cause. If your Azure subscription doesn't carry a support plan to do that, feel free to let me know so and I'd be happy to reach out to you in private comments to enable your subscription with a one-time free support case enablement for resolving this particular problem.
As for the successful creation of the Custom Connectors but them being absent on the Logic Apps side related issue, could you verify if the Customer Connectors were created in the same region/location as your Logic Apps is in? It might be that you've created the Logic Apps resource in Sweden Central
location first, and the Customer Connectors in North Europe
?