"only things that were available publicly via the web were archived. i don't have you e-mail address, phone or credit card number. unless you posted it yourself on parler." - https://twitter.com/donk_enby/status/1348666166978424832
If anything, the people on Parler doxxed themselves by posting all of it in public, it was all directly visible by everyone who used the site/app.
EDIT: Posts that people tried to delete are also in the dump, because of Parler's choice to only mark them as "deleted" and not actually delete them, hence they were still visible to admins. They were publicly visible in the past and could just as easily have been archived then.
Parler does have those people's e-mails and so on, but that is not in this dump. It will have to subpoenaed.