@Hari Vuppala As the Logic app standard uses Azure function runtime you can either capture the F2/fiddler traces to know the REST call that is called from the Azure portal. The Standard Logic app uses the same management API as the azure function. You can try leveraging the below REST call for Logic App Standard Recurrence trigger. To get the bearer token you can refer to this document.
REST URL : https://management.azure.com/subscriptions/{subscriptionID}/resourceGroups/{your resource groupname}/providers/Microsoft.Web/sites/{logicappname}/hostruntime/runtime/webhooks/workflow/api/management/workflows/{yourworkflowname}/triggers/{yourtriggername}/run?api-version=2018-11-01
METHOD: POST
Authorization: Bearer <Bearer Token>