Notify when in stock

I have just installed this wonderful plugin and I love it so far, however when I use the cross out/hide out of stock option it doesn’t allow my customers to enter a waitlist for that product variation (I use another plugin for this feature).

It would be great if my customers could both see which variations are our of stock without having to click one by one and also be able to enter a waitlist for the out of stock variation.

Is there a way to do it?

Thank you so much.

The page I need help with: [log in to see the link]