I have tried to modify one of the built-in templates (RealSteel). When using this template, I have experienced three issues with the Joomla privacy consent plugin and the user registration form:
When clicking on the Privacy Policy link below the registration form in a mobile browser the link does not work. It works in a desktop browser.
The radio buttons for switching between agreeing or not agreeing are reversed, so you need to click on the button that is activated to switch to the other option.
The cancel button in the bottom is not shown correctly.