Product Quantity no longer showing on product page

Site URL: https://fleurdenver.com/workshops-1/p/earring-making-workshop

Hi! I am hoping you can help.. I can no longer see the quantity on a product page on my website, just the variant. I enabled express checkout and then noticed the quantity box disappeared. I disabled it, but still no option to add multiple classes into the cart at checkout. Can you take a look for me and give any insights?? Thank you!

I just figured out I need to allow customers to purchase multiple service products in the commerce settings. Thanks!