Yes -- to all of your questions. When I load the supertrack, a dialogue asks if I want to load the superPatch which creates a blue entry on the mixer track. When I look in the plugins column, the Sforzando plugin is there. When I click and open that, notes sound on the Sforzando keyboard when I play them with the mouse. Everything seems to load correctly with no error messages-- just no supertrack notes occur when I hit "generate".
My default midi plugin is Cakewalk TTS-1 and this works fine for custom midi styles on the same track.


Band in a Box 2024 build 1111, Studio One 6.61, AMD 3900X, 32gb ram, Windows 10 Pro 22H2 64 bit, Behringer U-Phoria UMC1820, Yamaha CP33, TriplePlay midi controller

https://www.youtube.com/channel/UCkzi0yL2slMhPVCxc9E9usA