Hi @erivero​, there is no Automation trigger for a SharePoint Document Library watch.

You could potentially create a SharePoint Webhook and then use the Webhook Trigger.

Here is Microsoft's documentation on SharePoint Webhooks.

And here is a blog about getting started with Webhooks.

Another option is a polling workflow. This uses a schedule trigger to regularly run a workspace and connect to SharePoint to see if documents have been added. This will not be as immediate as a webhook, but potentially easier to implement. The SharePoint List Reader can read Document Library data, like the created or modified date of files. You could then use a ChangeDetector to determine which records have been added to the list or changed.

See Introduction to Scheduling and Change Detection Workflows in FME Server