Can the partition wall hole be covered with XPS boards?

More than writing and explaining how I want to structure it and asking if it works that way, I cannot do. But apparently, too much has been demanded of some people since Corona …. ….

But apparently some people have been asked too much since Corona .... ..

Yes, to finally take a proper photo (overview). Also, it seems drawing has been forgotten

Possibly also schematic drawings from above and the side. With dimensions and site plan.

Sorry. Maybe a doctor can help you so that you can get everything back in order. Come back afterwards and bring the requested information.

It doesn't matter at all where the AcoDrain channel is and where it drains to. The channel and drain come out of the double-walled masonry and the drain will be completely rebuilt.

You asked for help, and from a picture of a channel alone, it's difficult to imagine the rest only described in words. Because meaningful help can only come if the situation can be clearly understood.
It's not just one user who asked for more visual information, so it can't be completely irrelevant.
Otherwise, the tip is to get a suitable craftsman to your home.

It doesn't matter at all where the AcoDrain channel is and where it drains to.

If it doesn't matter at all, why are you giving us a photo of it? Show us the things that do matter! Do you want to cover the top of the wall with tiles with a slope, and put the rain gutter on the lower side of the slope? Does the space between the walls mean the gap with the hole?