If the original bike had a sloping top tube, which is suggested by the "virtual" measurement, then the seat tube length isn't super useful without the top tube angle. Assuming it's not a virtual seat tube length. However, I feel like I could reverse engineer it fairly well without that if given the actual measurements.

Kona used to label their bikes with actual seat tube length, even though they often had sloping top tubes. There was one bike they called a 58cm that I measured as a 65cm. Makes it really confusing, and I know it cost them at least one sale.