Shopify Watch Orders does not work in my scenario

Hello everyone, I am beginning in the world of automation. My goal is to set up an automatic inventory computations from different sources, one of them is shopify with BtoC. (for now I train with an end result in a googlesheet).
When I use my scenario with “search for orders” and I put some dates it works perfectly. I use to retrieve the historic operations.
Now I duplicated the scenario and used the “watch for orders” with an automatic run every night… and it does not pick any orders…At all…And I really don’t understand why. The rest of the scenario is similar…
My set up :
Statuts ANY
Financial : ANY
Fullfillment statuts : SHIPPED
Limit 20
I added a “run daily 17:00”…

Is there a hidden criteria that I did not see ?
And an additional question… if I solve this, how will it retrieve only once each order…

I don’t find a lot of litterature about this watch for orders.
Thank you in advance for your help.
Best regards,