Disallow use of scoping button when at freestyle song select

osu.Game/Screens/OnlinePlay/OnlinePlayFreestyleSelectV2.cs

@@ -33,6 +33,8 @@ namespace osu.Game.Screens.OnlinePlay
             this.item = item;
 
             Padding = new MarginPadding { Horizontal = HORIZONTAL_OVERFLOW_PADDING };
+
+            SupportScoping = false;
         }
 
         [BackgroundDependencyLoader]

osu.Game/Screens/SelectV2/PanelBeatmapSet.SpreadDisplay.cs

@@ -108,6 +108,7 @@ namespace osu.Game.Screens.SelectV2
                 showConvertedBeatmaps.BindValueChanged(_ => updateBeatmapSet(), true);
                 Expanded.BindValueChanged(_ => updateEnabled());
                 scopedBeatmapSet.BindValueChanged(_ => updateEnabled(), true);
+                scopedBeatmapSet.BindDisabledChanged(_ => updateEnabled(), true);
                 Enabled.BindValueChanged(_ => updateAppearance(), true);
                 FinishTransforms(true);
             }
@@ -210,7 +211,7 @@ namespace osu.Game.Screens.SelectV2
 
             private void updateEnabled()
             {
-                Enabled.Value = Expanded.Value && scopedBeatmapSet.Value == null;
+                Enabled.Value = Expanded.Value && !scopedBeatmapSet.Disabled && scopedBeatmapSet.Value == null;
             }
 
             protected override bool OnMouseDown(MouseDownEvent e)

osu.Game/Screens/SelectV2/SongSelect.cs

@@ -93,6 +93,12 @@ namespace osu.Game.Screens.SelectV2
         /// </summary>
         protected bool ControlGlobalMusic { get; init; } = true;
 
+        /// <summary>
+        /// Whether this song select instance should allow scoping down to a specific beatmap set,
+        /// exposing other difficulties that are otherwise hidden by filter criteria.
+        /// </summary>
+        protected bool SupportScoping { init => scopedBeatmapSet.Disabled = !value; }
+
         /// <summary>
         /// Whether the osu! logo should be shown at the bottom-right of the screen.
         /// </summary>