Multi-Channel Export Drops FX When Audio and FX Tracks Are Routed to Intermediate Group Tracks

But it is part of the export. I mentioned it twice.

…even if Solo Defeat is enabled in the effects track and downstream group…

8: Enable Solo Defeat on the “Echo” effect track
9: Enable Solo Defeat on the “Effects” group track

To be absolutely clear, Solo Defeat, in this context, enables the Effects subgroup in the export. Without it, you would be correct - the Effects subgroup would not appear in the export.