Sometimes if a table is the last thing in a text component, there is no obvious way to add more text or content after a table.
Start by editing the text inside the component.
Go to full screen editing to see all of the editing options.
Click inside the table.
Click on the table icon to enter table editing
Click or use arrow keys to enter the last table cell.
Click the pilcrow (paragraph mark).
You will now be below the table in a new paragraph. Add content.