Shopify : change status of an order


I want to change the status of a Shopify order to the status ready for pick up and I can’t seem to find how.

I am able to change the status of an order to fulfilled when I create a fulfillment for fulfillment order, but I don’t want to change the status to fulfilled, I just want to change it to ready for pick up so the shipping can know which order still needs to be picked up.

I also tried with the action create a fulfillment event, and chose the ready for pick up status but nothing is changing in Shopify.

Everything works well expect for the last step of updating the status of the order to ready for pick up.