Capture FTP of other devices in network

I’m challenged to capture ftp packets sent from a client to the gateway in a network. here a sketch of the network: https://drive.google.com/file/d/1Bj49JQIy5iYnzBM6DEFs8JLcJTJikUTT/view?usp=sharing

is it even possible to see the packets between client and gateway for me?