When you want to hatch elements that are in a phase that you are not currently in, then you will need the full Revit. This is because we use filters to override the display of categories.
Consider the view below. The Phase Filter is set to Show Complete. Therefore both phases A and B are shown the same.

Phase Filer Show All shows the new walls clearly but leaves the rest of the walls obscured alongside the other categories.

So now the aim is to show the other walls hatched in some other display except the phase override. We use filters for this. Filters are available in the Visibility Display Overrides if you have Revit and not Revit LT. It is an instance property of the view, but of course, you can encapsulate that in a view template. When you set up the filter, including the category/categories you need, and the common property that you would like to filter by. In this case, choose Walls that are of Phase A.

Add the filter and then override the patterns.

Now you can see how the walls clearly show up.

Now you can also dive in deeper and display different walls in different hatches. The same goes for other categories, types, and elements. So ultimately there may be many filters to create. If this is a typical workflow for your company, then put these filters in your template and include them in the view templates as well.
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