I got it to build in 5.3 by changing the “MetaHumanIdentity” module from “Runtime” to “Editor” in the MetaHuman uplugin file (<engine_installation_path>\Engine\Plugins\Marketplace\MetaHuman\MetaHuman.uplugin). I believe this is a bug, as all of its dependencies that are causing issues are “Editor” modules (MetaHumanSpeech2Face, AutoRigService, etc.). It can’t find those object files, because they aren’t generated with the “Runtime” modules.
I’m not sure if the MetaHuman Identity module is required for some functionality in a packaged project.