After activating Yonah you will see the following notice:
Click Begin installing plugins. You will be navigated to the Install Required Plugins page.
Simply check all of them (or all of the required plugins and some recommended plugins you like) and click Activate all plugins button
Recommended plugins: Elementor, Yonah Toolkit and
Advanced Custom Fields PRO. Contact Form 7, Tutor LMS, and Hibo Demo Importer.