Note: It only works for repls that were created after May 14, 2020.
I just finished a program that allows you to restore repls that are deleted. I've had this idea for a while and I've finally made it. Some people may be wondering how it works and I will tell you in the next section but all you need to do is enter the path of the repl (example: @PDanielY/Repl-Backup) and it will provide you with another repl created and then just fork that repl.
How its works
When you create a repl, it stores it in a database, and then every time you add a file or change a file it updates the database, and then when you delete the repl, the repl isn't deleted from the database, and then you can get it back. That's why it doesn't work with repl created before May 14, 2020, but if you have an API key you can restore repl created before May 14, 2020. (Sorry for the bad explanation)
Visit project here