You need to have website that has a landing page for your privacy policy. In your app the same link must be available to the user to click. Every app we have on the play store needed this done, even the widgets. Painful, but they are googles rules.
It is crazy, on what you have to pay attention to and what you have to have everything. In 2 years you have to write two pages about why the button "Hello World" outputs...
PS: Google Translate outputs a Perfect German sentence if you translate my answer
That would enormously prolong the development of my social network App.... (end of juli 2018 1 year in Development, android is rdy, now i develop it for IOS thx XUI)