JSFiddle - React, Tailwind, and code Playground

HTML

<form action="адрес обработчика" method="post">
<input type="text"id="country_d" style=""/>
<input type="text"id="region_d" style=""/>
<input type="text"id="zone_d" style=""/>
<input type="text"id="city_d" style=""/>
<input type="text"id="street_d" style=""/>
<input type="text"id="number" style=""/>
<input id="button" style="display: none;" type="submit" value="Создать" name="create"/>

JavaScript

function empty(str) { return !str.length };

$(':input').each( function() {
    $(this).keypress( function() {
        if (!empty($('#city_d').val()) & !empty($('#region_d').val()) & !empty($('#zone_d').val()) & !empty($('#city_d').val()))
                
                    $(':submit').show();       
    });
});