pgadmin 4, cannot find "edit data"

After editing the data, simple click on Save Data Changes (F6) icon.

You can select the table, use the right mouse button to select “View Data” and any of the subselections you choose.

You can add new rows in the resulting grid.

To save them in the database, use the “Save” icon with the image of a floppy disk:

The table needs to have a primary key to become editable in pgadmin so that the column names have a pencil icon next to them instead of a padlock.