If a parent tells a child to get out of their house can that parent then call the child in as a runaway?

Well, they can but they would be lying. The parent is kicking them out of the house, the child is not running away; sooner or later the police (if the parent did call the child in as a runaway) would probably figure out the child did not runaway and the child was kicked out.

If the parents kicked them out, then why would they call the child in as a missing if they didn't want them?