Hi there, kingscabins2. I'll share a workaround so you can get back your vendors list in your mobile app.
A possible reason you can't see the list on your app can be due to syncing issues. With this, let's try some troubleshooting steps so you can get back to business. First, you can access your account on a web browser and check if you can see your vendors list.
Next, if this works on the browser, you can go back to your mobile app and sync all the data in your account by refreshing it. You can follow the steps below for your reference:
Please feel free to leave a comment down below in case you require any assistance in managing your vendor list or have other QuickBooks-related concerns. We would be more than happy to assist you round the clock. Have a great day!