*Onto the table* describes an action of moving from off to on a table.
*On the table* is a well-known saying that can mean "to be the current topic of discussion." - but it can also describe something that is literally on a table - it would not necessarily be moving.
*On the table* is a well-known saying that can mean "to be the current topic of discussion." - but it can also describe something that is literally on a table - it would not necessarily be moving.
