Try to change your template to one of the suggested values such as 2021-06-01 and set the resource provider to Azure Sentinel.
Reference from the troubleshooting guide:
Code: NoRegisteredProviderFound
Message: No registered resource provider found for location {location}
and API version {api-version} for type {resource-type}.
The error message should give you suggestions for the supported locations and API versions. You can change your template to one of the suggested values. Most providers are registered automatically by the Azure portal or the command-line interface you're using, but not all. If you haven't used a particular resource provider before, you may need to register that provider.