Hello, 

Is there a way to add a button that will show up when the product goes out of stock so that customer can send an inquiry about the product? 

Hello I found a different solution 

i created additional button and gave it a unique ID and also created a seperate pop up with its own trigger

here is the js if anyone ever has the same problem 

document.addEventListener("DOMContentLoaded", function() {
    var stockElement = document.querySelector(".stock.out-of-stock");
    var button = document.getElementById("inquiry-button");
    
    if (button) {
        if (stockElement) {    
            button.style.display = "inline-block";
        } else {
            button.style.display = "none";
        }
    }
});