Given that Airbus supplied pitch/power data to pilots from the get-go I think
They doubtless provided weight and balance tables as well.
That isn't as important is the issue of "you tend to play the way you practice."
What is practiced?
PJ reproduced an A320 pitch and power table from the 90's. If you practice using that, or resorting to it under conditions X, Y, or Z, then when you are missing that critical performance instrument, airspeed, you call that up and proceed.
If that's how you train.