my iphone 8 wont let me verify it sends the code to my phone but there is no where to enter it

Try the following....

1. On your iPhone, go to Settings → iCloud → Keychain and switch Keychain off then on again.
2. Tap "Approve with Security Code", tap "Forgot Code" and then tap "Reset".
3. Follow the instructions to reset iCloud keychain and create a new passcode.
4. You will then be prompted to update to your new number.

If you see a password box, enter the password (ABC) followed by the code (123) or ABC123.