JSFiddle - React, Tailwind, and code Playground

HTML

<form onsubmit="return false">
<input data-order="1" placeholder="nome">
<input data-order="2" placeholder="sobrenome" disabled>
<input data-order="3" placeholder="idade" disabled>
<input data-order="4" placeholder="celular" disabled>
<input data-order="5" type="submit" disabled>
</form>

JavaScript

$($("input").on("change input", function(){    
    if ($(this).val()){
        let atual = $(this).data("order")
        $('input[data-order="' + (atual + 1) + '"]').removeAttr("disabled")
    }
    else{
    	$("input[type=submit]").attr("disabled", true)
    }
}))