Not sure what version of BiaB you are using, but you could place the visible metronome on the screen and use it (either with or without sound).

Options > preferences > CountIn/Met.

Set to display whole song:

Attached Files (Click to download or enlarge) (Only available when you are logged in)
2020-02-01_10-57-24.jpg (38.72 KB, 58 downloads)

BIAB & RB2026 Win.(Audiophile), Windows 10 Pro & Windows 11, Cakewalk Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Session Keys Grand S & Electric R, Kontakt, Focusrite 18i20, KetronSD2, NS40M, Pioneer Active Monitors.