can you do it this way?
var standardLogicApp = new WebApp($"Instanda-{sn}-logic-", new()
    {
        Kind = "functionapp,workflowapp",
        ResourceGroupName = resourceGroup.Name,
        Location = resourceGroup.Location,
        ServerFarmId = appServicePlace.Id,
        Identity = new ManagedServiceIdentityArgs
        {
        },
        SiteConfig = new SiteConfigArgs
        {
            AppSettings = new[]{
                    new NameValuePairArgs
                    {
                        Name = "FUNCTIONS_EXTENSION_VERSION",
                        Value = "~4"
                    },
                    new NameValuePairArgs
                    {
                        Name = "FUNCTIONS_WORKER_RUNTIME",
                        Value = "node"
                    },
                    new NameValuePairArgs
                    {
                        Name = "WEBSITE_NODE_DEFAULT_VERSION",
                        Value = "~14"
                    },
                    new NameValuePairArgs
                    {
                        Name = "WEBSITE_CONTENTSHARE",
                        Value = Output.Format($"workflows")
                    },
                    new NameValuePairArgs
                    {
                        Name = "AzureWebJobsStorage",
                        Value = Output.Format($"DefaultEndpointsProtocol=https;AccountName={storageAccount.Name};AccountKey={primaryStorageKey};EndpointSuffix=
core.windows.net"),
                    },
                    new NameValuePairArgs
                    {
                        Name = "WEBSITE_CONTENTAZUREFILECONNECTIONSTRING",
                        Value = Output.Format($"DefaultEndpointsProtocol=https;AccountName={storageAccount.Name};AccountKey={primaryStorageKey};EndpointSuffix=
core.windows.net"),
                    },
                    new NameValuePairArgs
                    {
                        Name = "AzureFunctionsJobHost__extensionBundle__id",
                        Value = "Microsoft.Azure.Functions.ExtensionBundle.Workflows",
                    },
                    new NameValuePairArgs
                    {
                        Name = "AzureFunctionsJobHost__extensionBundle__version",
                        Value = "[1.*, 2.0.0)",
                    },
                    new NameValuePairArgs
                    {
                        Name = "APP_KIND",
                        Value = "workflowapp",
                    },
                },
        },
    });