I appreciate your effort, Ashley. Normally, the project name should automatically appear in the customer field on your invoices along with your customer's name.
I’ve attached photos below to show where the project is located on the invoice and how it appears when printed:


Since this isn't appearing on your end, it may be a browser-related issue. Please try logging in to your QuickBooks Online account via a private or incognito window. This ignores existing cache files and helps determine if the browser is the source of the error. Alternatively, you might try using a different supported browser, such as Google Chrome, for a more stable experience.
Please don't hesitate to leave a post below if you still need further assistance.