This has nothing to do with Parler. Google has been auto-banning apps based on stupid blacklists and ML magic for years because they don't have a human review process (or if they do, it doesn't do good work). A couple of weeks ago it hit a Matrix chat app and it's been restored now. The shit storm will now lead to someone at Google escalating this and the app will be back soon. I'm pretty sure that banning Parler was a decision where a lot of people where involved.