What spikey_richie suggests will reset the whole context menu back to the look from Windows 10 which might be what someone wants but does not answer the OP's specific question.
I was looking for a way to only get the "Create New Text Document"-option back. Found this great page: https://www.tenforums.com/tutorials/24412-add-remove-default-new-context-menu-items-windows-10-a.html
And used the "Restore_New_Text_Document_context_menu_item.reg"-file which worked great.
To only restore what the OP asked, the following .reg file is the only thing needed. A sign out/sign in OR reboot is needed for explorer.exe to pick up the change.
Windows Registry Editor Version 5.00