Great that you give Triggre a go! I will try to answer your questions.
1) A short answer: No, however there are other options with the same result. In most cases, I create a form field where I can select multiple lines. How do you do that? Well, create a reference form field of the data item in that table.
2) Yes it is. Depends a bit of your goal. If you want to set the status of all selected orders, you create a simple flowpart. Let’s say that you want to update the status of a quotation (=offerte).
Ofcourse you can also use an automation flow. There you can check old and new values and determine when you want to send this to another system.
3) I hope that you gives you a push in the right direction.
Does this answer your questions?