When there is no orderID in your URL it is not possible to link via the Open URL option to that page in the Shortcuts app. Sometimes, for example on order search pages, a POST Form does the trick.
I do know how POST Form works
If you do not how a POST Form works, great, you can use your browsers Developer Tools to figure out how and what to fill.
What is a POST Form?
If you don't know what a POST Form does, then we recommend you plan a quick web-meeting with us here. Make sure that you may share your screen, as we need to have a look at your external system.