Supply Theme: How to show 'In Stock' or 'Out of Stock' on variant dropdown selector

Hello, I’m hoping someone can help me here. I’ve looked on here to see if it’s been brought up before but I can’t see anything. I use the Supply theme for a client but one thing that I’m struggling to solve Is on the product page, where the variant dropdown selector is id like it to show if that variant is In Stock or Out of Stock. Is this possible?

Currently shows like this.

But I would like it to appear like this

Any help would be greatly appreciated.

URL is www.lincolnshirevapours.co.uk

Thanks