Using Typo3 Enterprise CMS? There is an extenstion which publishes the cookiebanner automatically on your Typo3 website. The cookie declaration can be published on your preferred page as well.

Version 1.1.0 has a new feature – It is possible to switch between automatic cookie blocking mode and manual mode.

More information: https://extensions.typo3.org/extension/cookiebot/

Documentation: https://github.com/mjpr263/cookiebot/blob/master/readme.rst