Click the hamburger icon on the upper-left of the page and select Recycle Bin under Database Management.
If you accidentally delete a tab, sheet, or entry, you can recover it using the Recycle Bin.
With the Filter History, you can find and restore deleted records much faster and easier.
When you click a record URL and find that it has been deleted, you can paste the URL into the Filter by record URL to check if it's in the recycle bin.
The complete URL for the data is: https://{domain}/{apname}/{path}/{sheetIndex}/{nodeId}, for example: https://www.ragic.com/LearningRagic/forms45/1/0.