Thank you for contacting us, Pickle,
I'm here to help you today. You can look for an app through this link, https://quickbooks.intuit.com/app/apps/home that can help import bills. All apps in this store are already integrated with QuickBooks Online.
On the other hand, the Import Bills feature in QBO can help you transfer bills with multiple line items. And, by batch to more than 100 entries at a time. Feel free to read through this article for more details: Import your bills.
Stay in touch if you need additional information. I'm always right here to help.