Hello there, @L01.
Thanks for visiting the Community today. I'm here to help ensure the transfer and the transactions created under a different chart of accounts will show on the Budget.
First off, let's check the Settings above the Total column and ensure that the Hide blank rows option isn't selected to show all your accounts and subaccounts in the report.
For more insights about creating and modifying a Budget report, read through this article for your reference: Create budgets in QuickBooks Online.
Feel free to message again in the Community if you have additional questions. We're always delighted to assist.