The Focusrite is an audio interface, not a MIDI interface. You need a MIDI synth in your PC, which should be easy to preove.

If you go to tag Misc->MIDI->MIDI/Adio Driver Setup, enable the checkbox "Use VSTi/DXi Synth" and then select CoyoteWT in the box below it.
Assuming your audio from BiaB is working, that should be enough to get some sound.
If your audio isn't working, then a little further down the dsame dialog is tyhe button "Audio Settings...[]" and in that try selecting probably WAS or MME (ASIO is a bit hit-and-miss).
Do whatever OKs you need to get back to the main BiaB window and try it.

Jazz relative beginner, starting at a much older age than was helpful.
AVL:MXE Linux; Windows 11
BIAB2025 Audiophile, a bunch of other software.
Kawai MP6, Ui24R, Focusrite Saffire Pro40 and Scarletts
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