Received a PM asking me to respond.

There isn't a rule for this, no. The (really) annoying thing about idioms is that there is no rule - it's just the way the language is and we're supposed to memorize it. Sometimes it's the case that similar forms of words will be followed by the same preposition, but not always.

I am capable of studying.
I have the capability to study.

It's annoying that we can't reproduce OG questions online. Could you tell me the book and problem number so I can look it up? I'd like to read the explanation. I do agree, though, that "awareness of" is preferable to "about."

Anyway, the nutshell is: idioms are mostly about memorization and there's not a lot we can do to get around that. (I'm learning that very slowly and painfully right now as I try to learn French.)