Akainu and Aokiji probably have awakenings.
There’s no way Oda won’t show us logia awakenings before the series ends. You can also explain them not using it really easily, because Marineford is their home turf.
Let’s say that Akainu is fighting the scabbards or SN5, then decides to activate his awakening and turn the battlefield into a hellscape. What can they even do?
For the other admirals it’s iffy, but I’m like 99% sure the fleet admiral candidates were actually holding back.