We try to handle support as transparent as possible, so that anyone can learn from it. That’s why we prefer to answer questions either on Slack or GitLab.
Hyvä React Checkout - Github
Since the Hyvä Checkout is Open Source, you can find it on GitHub at the Hyvä Organisation:
Issues are publicly tracked at https://github.com/hyva-themes/magento2-react-checkout/issues
Hyvä Themes - GitLab
Hyvä Themes are accessible on a private GitLab for customers and technical partners at https://gitlab.hyva.io/hyva-themes/