It looks like you have an existing eBay integration with QuickBooks Online (QBO). It also shows they've just released their new payment service, Managed Payments. Thus, I'd suggest contacting their dedicated support team to help you prepare for this. They can provide further details about the benefits when using it and the changes to your QBO syncing process.
As always, I recommend going to your My Apps tab from the Apps menu. You can launch, support, disconnect, or leave an app's review from there, such as eBay. View the screenshot below for your reference. For more details, visit this article: Managing Apps.
I'm here anytime you have other concerns. Keep safe always, @gtwoodbr.