Only receiving “message” field from submitted contact forms

What plugin are you using for this contact form, or was it built into your theme?

No, not for the SMTP, for the contact form itself.

If Im understanding your question correctly. It is called global contact form.
(sorry If that is not it)

In that case, I recommend reporting the issue at https://wordpress.org/support/plugin/wpforms-lite/ so the plugin’s developers and support community can help you with this.

Will do. Thank you for your timely responses.