Get Logic App Standard workflow trigger url

APIM-policy-fragment.xml

<fragment>
	<choose>
		<when condition="@(null != context.Variables.GetValueOrDefault<string>("LaWfName", null))">
			<cache-lookup-value key="@(context.Variables.GetValueOrDefault<string>("LaWfName", null))" variable-name="LAWfTriggerUri" caching-type="internal" />
			<choose>
				<when condition="@(string.IsNullOrEmpty(context.Variables.GetValueOrDefault<string>("LAWfTriggerUri", null)))">
					<send-request mode="new" timeout="20" ignore-error="false" response-variable-name="LAWfTriggerResponse">
						<set-url>@{
                            var laName = context.Variables.GetValueOrDefault<string>("LaName", null);
                            var laWfName = context.Variables.GetValueOrDefault<string>("LaWfName", null);
                            return $"https://management.azure.com{{LAResoureGroupId}}/providers/Microsoft.Web/sites/{laName}/hostruntime/runtime/webhooks/workflow/api/management/workflows/{laWfName}/triggers/manual/listCallbackUrl?api-version=2022-03-01";
                        }</set-url>
						<set-method>POST</set-method>
						<!-- Requires Logic Apps Standard Operator role -->
						<authentication-managed-identity resource="https://management.azure.com/" />
					</send-request>
					<set-variable name="LAWfTriggerBody" value="@(((IResponse)context.Variables["LAWfTriggerResponse"]).Body.As<JObject>())" />
					<set-variable name="LAWfTriggerUri" value="@(context.Variables.GetValueOrDefault<JObject>("LAWfTriggerBody", null)?["value"]?.ToString())" />
					<cache-store-value key="@(context.Variables.GetValueOrDefault<string>("LaWfName", null))" value="@(context.Variables.GetValueOrDefault<string>("LAWfTriggerUri", null))" duration="300" caching-type="internal" />
				</when>
			</choose>
			<set-backend-service base-url="@((new Uri(context.Variables.GetValueOrDefault<string>("LAWfTriggerUri", null))).GetLeftPart(UriPartial.Authority))" />
			<rewrite-uri template="@((new Uri(context.Variables.GetValueOrDefault<string>("LAWfTriggerUri", null))).PathAndQuery)" />
		</when>
	</choose>
</fragment>