How to use `$switch`/`$branch`/`$case` with LINQ v3？

I find that `p => p.Mode == 1 ? "A" : "B"` will be translated into `$cond`/`$if`/`$else`. But currently it seems does not support `switch` pattern:

p => p.Mode switch
{
    1 => "A",
    2 => "B",
    _ => "Z"
}

Any possibility to implement it? Or did I miss something already documented before?

Thanks in advance.