How do I configure my router to wpa2 on IPad?

Do it manually.

Settings > Wi-Fi >

1. If you are already connected to Wi-Fi, delete it

2. In Choose a Network, tap Other...

3. For Name: key in the SSID

4. Security: choose WPA2

You need to the info for your router to get the router’s IP address and to access the router's IP address and software from a web browser.

You're welcome.