Opacity control in render
No, the opacirty control in the model space viewport is really an aid to modeling or for quick visualization.
Fusion 360 uses a physically based rendering approach and if you want transparency you need to select a transparent material e.g.glas, acrylic plastic ets.
You can achieve a simlar effect but much better looking IMHO with using for example the "Glass - Light Color" from the material list.
Drag it to your object and then right-click on thhe materila icon and select duplicate. Then right-click on the duplicate and select edit.
This will allow you to edit the absorption distance. More distance means more transparent and vice versa.
Rename the material to what you like and save to your favorites for re-use in the next project.
BTW, here's another little hint. But small radii on all your visble edges. That will make any rendering look so much better than these unnatural sharp edges.
