ok, now I tried everything and finally something worked.
In WP dashboards selection for WPForms > Seting I needed to set “Include Form Styling” to “Base Styling Only” and it fixed my issue of not having control over position of SEND button. Hope it helps someone! ^_^
What I meant was, can the form fetch data from a field that isn’t generated by the form tags, as in place of [select menu-###] we are using code provided by Omniva and its redirection to the page
