So I actually ferment 50# at a time and it gets served out over 5-7 days. It never really absorbs more than the first 12 hours (actually probably less than that). I use flock raiser crumbles. Stirring definitely speeds up the ferment as has been noted several times through out this thread... the ferment is grabbing things from the air to make the process happen, so stirring especially in the first few days of a batch can help speed the process. I would expect crumbles to ferment a little faster since it seems like there is more surface area to it than whole grains, once the water is absorbed. Or in other words because it is more processed and broken down already.
Note, as the ferment goes along... the opposite of absorption will actually happen and you start to get separation.

Anybody remember the thin/soupy layer talked about near the bottom of the container in the tiktok FAQ? That never happens in the first couple days for me. Also as it ages it will start releasing it's water out of the top of the feed, and make that brown water sitting on top.
Agreed, my birds do NOT like soupy feed.
Also, I thought the bubbles are only the first indicator that your feed is fermenting not the actual final product... It is the gasses the bacteria are putting off. The bubbles rise easier and are more visible at the top on thinner mixtures. It's nice to see it in that glass jar. Thinking a 48 hour soak might be better than 24 to achieve full benefits of FF.
ETA: a bigger back slop would put the 24 hour process farther along.