Hi there, @Estella1 !
Thank you for your post, I’m happy to look into this with you.
I recommend checking out our help document which includes our merchant requirements for using Shop. Some of the requirements are being on the Basic plan or higher, having Shopify Payments enabled, processing your first sale using Shopify Payments more than 90 days ago, and more. You can read over the requirements and double check that you’re complying with all of them. If you feel as though you are, you can contact our live support team via the Help Center to have them review your account. We’re available 24/7 via live chat, email, and callback to answer any questions you may have.
I hope this helps! Let me know if I can clarify anything for you.