Welcome to the Intuit Community forum, datebarlk.
@vpcontroller is right! To add up, it could be a browser-related issue. Clearing the browser's cache helps delete the most recent accessed data stored in this window. Thus, causing the More button to disappear.
To help restore the button, use the links outlined below so you can delete a transaction:
As an alternative, make sure to use supported browsers. This is to ensure you'll get the best out of your QuickBooks experience.
I've also added this article: Void or delete transactions to learn more on how to remove entries you've entered into the system. It provides instructions, detailed steps, and screenshots for additional information.
Should you need anything else, please let me know. I always have your back.
Thank you and keep safe!