ipsw macho search vs ipsw dyld search

[nmggithub]

I am trying to use ipsw to search for some libraries that contain symbols. I've been using ipsw macho search for this, but that means I have to keep an .ipsw file lying around to scan. Recently, I found that it may be missing some things. Do .ipsw files include the dyld cache in a searchable manner? If not, then I understand. I could use ipsw dyld search, but it seems to only be able to search for Objective-C and Swift concepts. There is no symbol search option, at least given the help output. Am I mistaken?