I could be very wrong about this, but I'm not remembering any new MIDI features introduced between BIAB 2020 and 2025.
That gave me a thought - it is possible to enable Playable Realtracks on an RT track then specify all notes as Playable
without creating a mute region, which would cause the notes to play through Sforzando while simultaneously playing the underlying RealTrack. That's an awful lot of hoops to jump through for this to happen though.