This is an emergency! I hope someone can help… Please! I have broken my production website ;(

I have spent the past 24 hours configuring a new theme for my Woocommerce website, now all the product variations for sizes are gone, they are no longer appearing on the product page, but they do exist in admin – not having sizes on the website means people cannot order. Does anyone have any idea what the issue could be please?

thank you in advance