How are you all doing?

I have a question, and I haven't been able to find a good answer to this problem.

Maybe I didn't do it the best way.

Here's the thing: I have a wainscoting ceiling; it's angled and forms a corner of a house.

I made a standard piece in SolidWorks and dragged it into the assembly environment. There, I placed several pieces side by side to form the ceiling, and cut them in the assembly environment to form the corner of the house.

So far so good, but what's bothering me is that I have to separate each piece to be able to go to the detailing environment...

And I can't separate piece by piece; each one will have its own specific length and cutting angle. I don't know how I should do this.

I have many parts, as can be seen in the tree. And I wanted to export these parts so I could detail them separately.

I can isolate the piece, but I can't save it separately even with the cut I made.

Can I export these parts automatically, or save them one by one if that's the best option...?

Thanks.