No it can't. The the thing, it's obfuscated.

I'm gonna trust the grapheneos HN account on this one.

An unmounted, hidden veracrypt volume is pretty much undetectable with the typical forensics, if the OS hasn't leaked anything that would expose it. I don't know what their official account was alluding to with that wildcard statement.

That's on HDDs, phones don't use HDDs. We already did this [1]?

[1] https://news.ycombinator.com/threads?id=Cider9986#49058421

https://veracrypt.io/en/Trim%20Operation.html

https://veracrypt.io/en/Wear-Leveling.html