They are the orders that are pending to be delivered by a supplier. They are identified with different states:

Received: It is the order that enters your supplier as new. When the order is in this state, you can modify it by adding or removing quantities and products. In this way you avoid placing a new order if you have forgotten to order something.

In process:  It is the order that the supplier is already putting together to be able to deliver it. In this state, the order cannot be modified by the restaurant. You can communicate by chat and inform him of any changes or place a new order.

In process with modification: It is the order that the supplier cannot fulfill completely due to the lack of stock of a product or another impossibility. In this case, the supplier will be able to edit the order and the changes will be reflected in your section (within the order you originally made).

In delivery: It is the order that is on its way to be delivered by the supplier.

Delivered: It is the order that has already been delivered by the supplier. This order will go to the "Previous Orders" section within "Home" of your account. You can also see them in "Menu"> "My orders" > "Previous orders"

Cancelled: It is the order canceled by the supplier or also by the restaurant.  This order will go to the "Previous orders" section within "Start" of your account. You can also see them in "Menu"> "My orders" > "Previous orders"

When the order is in the "Received" status, you can modify it by adding or removing quantities and products. This way you avoid placing a new order if you have forgotten to order something. In the states "In process", "In process with modification", "In delivery", "Delivered", "Cancelled" and "Invoiced" you will not be able to edit or modify said order. You will have to make a new one or communicate with the provider via chat.

You find it in "Menu" > "My suppliers" > click on the supplier you want to see the list of, > click on "Orders" and you will find the list of all orders made previously. From there you can also repeat an order.