Why is the workflow not triggering when a new document is uploaded to SharePoint?

Ensure the correct workflow is selected
When creating a document in SharePoint, make sure to select the desired workflow before uploading.
Check the document library settings
Ensure the settings of the document library are correctly configured and that a workflow is linked to it.
Verify the user permissions
Confirm that the users have the correct permission levels to initiate and complete the workflow.
Check the workflow history
View the workflow history to see if the workflow has been triggered upon document upload.