SSID remotely

It is possible, but you need a computer, see this Apple article: Recommended settings for Wi-Fi routers and access points

https://support.apple.com/en-us/HT202068

You SSID is the name of your Wi-Fi router. It should be on a label on the router, unless you changed it from its default. But if you did you should know what you changed it to.

Are you sure it is the SSID you are asking about, or is it some other value that is associated with your phone rather than your router?