Hello, @Faiz,
Thank you for your response.
We kindly request you to thoroughly review the description of the reset database plugin. This will ensure that you have a comprehensive understanding of its functionality and usage. https://wordpress.org/plugins/wordpress-database-reset/
Furthermore, If you do not want to delete everything, maybe WordPress support will suggest you a plugin that helps to delete particular content.
Thank you for your attention to this matter.
Best Regards,
8Theme’s Team.