Firstly, welcome.

What version of BiaB do you have? That screen capture is from an old version, and the layout format now does not include those keyboards.

A separate Mixer shows the keyboards and the instruments in a different layout:

Hope this helps.

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BIAB & RB2021(Audiophile), SonarPlatinum, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M StudioMonitors, Pioneer Active Monitors, AKG K271 Studio H'phones