@Pierce1,

All Kasa Devices except for cameras support a 'Soft Reset', which allows the reconfiguration of only the network credentials of the device through the Kasa app. Soft resets do not reset other settings, meaning device names, schedules, and smart actions will remain in effect. 

Check out this guide another user posted on this topic for Smart Switches: How to set up WiFi networks after changing the name or password...this is how.

Normally, a soft reset requires you to hold a button for half the time it takes for a factory reset:

For hardwired devices, like outlets and switches, there will be a reset button that you hold for 5 seconds. This will allow the device to be seen and setup in the Tapo app.

For plugs and light strips,  hold the button for 5 seconds.

For light bulbs, you will need to follow a sequence of on-offs

As an FYI, you can find the meanings of the LED indicators and the Reset processes in the User Guides for your devices: Product Downloads