Based on the provided context, it seems that the HTTP connector is not available in the list of data stores while creating a dataset in Azure Data Factory. This could be due to a few reasons, such as the HTTP connector not being supported or not being installed.
To troubleshoot this issue, you can try the following steps:
- Check if the HTTP connector is supported in Azure Data Factory. You can refer to the official documentation for a list of supported connectors.
- If the HTTP connector is supported, make sure that it is installed. You can check this by going to the Author tab in Azure Data Factory Studio, selecting the plus sign icon, and choosing the HTTP connector from the list of available connectors.
- If the HTTP connector is not installed, you can try installing it by following the instructions in the official documentation.
If the above steps do not resolve the issue, you can try reaching out to Microsoft support for further assistance.