Question:

How can I find orders that have already been scheduled

Answer:

 

The Trip ID column can be used for this purpose. If necessary, this column must be displayed in the route planning/order table.
Then you can use a filter, for example:"Tour ID is not NULL", to display all scheduled orders.

Alternativ - the column "Status" can be used  Status=planned

If you want to search for a specific order and want to get the information on which trip these order was planned you can use the "Quick Search"