You can use the printer via the wireless router from your smart device when you connect the printer to the same network as the wireless router.
To set up a new connection, access the following website from the smart device that you want to connect to the printer. Enter the product name, go to Setup, and then start the setup.
You can watch the procedure in the Web Video Manuals. Access the following website.
https://support.epson.net/publist/vlink.php?code=VC00006
If you have already set up the connection between your smart device and the printer but need to reconfigure it, you can do so from an app such as Epson Smart Panel.