If you subscribed to DAZN, Day 15 session 2 is still available in the archives. Starting shortly after the 26:30 mark is discussion of Si looking object ball last. Stephen Hendry praise of his cue ball control is followed by discussion of Si's eye pattern and his(Stephen's) last look at the white. I didn't notice a similar analysis of Luca's eye pattern but the evidence is available.
27:30 gets to the eye pattern. I find it amusing when Stephen says, "It's not something you choose to do, just the way you play."
I will review further and try to find a time stamp for a close look at Luca's eyes.