Is the data type of the database column a string type or a number type?
If it’s a string type, just set the table column’s render property to string.
If it’s being stored as a number then yes, you’ll need to left pad it yourself and again, set the column render property to string.
EDIT: I can see now that you didn’t actually set up any of your columns in the table, you just let them be handled automatically. You’ll need to manually add the columns in the table component and set them up so that the first column is rendered as a string, because right now it’s automatically detecting that it’s a number. And again, if the data is being brought in as a number, you’ll have to left pad it yourself - probably through a scripting transform.