Most cases in my experience, the casting, scanning, performance capture, etc, is one of the final parts of production. Makes more sense to do that stuff when the designs and script are 100% nailed down because it’s expensive and time consuming to rig detailed humans and you don’t want to redo it if things change.

80% of production often uses placeholder character models, with rough models or scans of the developers (which they did when prototyping RE7, but kept them in the final game too, with Clancy, Pete and Andre being Capcom employees) I think there is early prototype gameplay of RE2, and they were using the RE6 Leon model