I am not seeing the option for wifi calling after going to settings

This article is relevant:

Make a call with Wi-Fi Calling - Apple Support

Does your carrier support Wi-Fi calling?

Wireless carrier support and features for iPhone in the United States and Canada - Apple Support

This link—>Make a call with Wi-Fi Calling - Apple Support says that a 5c or later is needed:

To use Wi-Fi Calling, you need an iPhone 5c or later on a supported carrier.

So next go to Settings/General/About and see if it really is a 5c and not a 5.

If it is really a 5c contact the carrier and ask them to provision Wi-Fi calling on the phone’s number.

WiFi calling requires an iPhone 6 or later.

I've never seen a carrier outside of the US that actually supported WiFi calling on a 5, 5c, or 5s.

I guess Apple could be mistaken in the kB article.