This does not look like a WinSCP question. There's nothing like "WinSCP FTP Server". WinSCP is an FTP client that you might use to connect to your FTP server. But making your FTP server do something automatically is a question about the FTP server, not WinSCP.

Hey! I have a FTP Server thats on an EC2 Windows machine, I also have a Python script that uploads all files from the server to a S3 bucket periodically using Windows Task Scheduler.
My question is as follows: Is there any way I can run the script automatically whenever a new file lands on the FTP Server?