I agree Ozcantabak here, Doomsday says "
my powers can only pause this moment for so long", which might support Infinite Speed here, but the Flash also says "
I saw you slow down time..." which implies time did not completely freeze. This already contradicts Flash moving at any speed above MFTL+, in this scan. This is because a character with Infinite Speed would see a finite speed character as frozen, however if time is only slowed down to a significant degree but not stopped it's just a higher degree of MFTL+. While no character w/ finite speed can see another character as truly "frozen", a MFTL+ character can still move so fast that another MFTL+ character is effectively frozen to them. For example, Superman's data feat was 4.9593314e17c, and baseline MFTL+ starts at 1000c, which makes him 4.9593314e14 faster. Millions of years for a baseline MFTL+ character is only a second for him. Why is this important? Let me be clear, I am not saying this is the level of difference between Wally at MFTL+ and Superman. My goal is pointing out the difference being "effectively frozen" and "actually frozen". A character who takes a million years to make a slight movement would appear frozen for all intents and purposes.