We're having issues with the integration between Shopify and eBay. When we publish a listing in the eBay sales channel, some are not publishing to the store, the listing is still tied to the seller profile, just not in the storefront for some reason.
Welcome to Shopify Community. My name is Olivia and I work here.
Thanks for reaching out to our network with your question. If you are in fact using the Shopify eBay sales channel as asked by @CourtneyMiller, then you will need to connect with the Shopify eBay sales channel support team for troubleshooting steps and further guidance.
You can connect with them directly here:
eBay Sales Channel Support
Phone: 1 (855) 411-3376
I trust they will be able to provide further support, but please keep us posted with the solution for future readers.