Hi @Cristina,
We’ve enabled Stock Status under XStore > Theme Options > WooCommerce(Shop) > Single Product > Layout: https://prnt.sc/3hyxMEWf_0gM
Now everything is working correctly: https://prnt.sc/v4kJ0oBhnSXR.
Could you please check again: https://whatevernacional.com/product/foil-para-toner-arcoiris/?
Thank you!