[svn] Branching project folders in a solution

I have a C# solution with several projects. A simplified version of the on-disk structure is as follows, with [brackets] differentiating folders from files:

[Solution]
    Solution.sln
    [Project 1]
        Project 1.csproj
        A.cs
        B.cs
        C.cs
    [Project 2]
        Project 2.csproj
        X.cs
        Y.cs
    [Project 3]
        Project 3.csproj
        Z.cs

The Solution Explorer pane in Rider looks like this:

Solution
    Project 1
        A.cs
        B.cs
        C.cs
    Project 2
        X.cs
        Y.cs
    Project 3
        Z.cs

I want to branch the entire "Project 1" folder recursively. How do I do that? If I right-click the "Project 1" node and invoke "Subversion > Branch or Tag...", it tries to branch just the "Project 1.csproj" file. Try as I might, I cannot find any way to branch an entire project. For that matter, I can't find a way to branch the entire solution either. I've only been able to branch individual files, which is simply not viable in a solution of this size.

I've tried looking for an option to display projects separately from their enclosing folders in the Solution Explorer, but I see no such option.

Is the functionality I'm looking for simply not available in the current EAP, or is there some trick that I'm missing?