Hello,
Thank you for your reply.
In the default functionality of the plugin, the Verify OTP button is hidden and only visible after the OTP is sent.
It seems this is a site-specific issue and there is a CSS conflict with the theme/plugins you are using.
Please let me know how you would like to connect so that we can resolve the conflict.
You can reach out to us on our support by clicking on the Need Help icon on the bottom right of the plugin so that we can help you with your query.
Thanks