To get insights and visualization of Bots, it would require a paid plan such as Pro plan. More advanced reports are available for the Super Bot Fight Mode, the Enterprise Bot Management feature, which requires an Enterprise plan.
Furthermore, from the recent blogpost quite good Analytics is now available at Cloudflare dashboard → Security → Analytics:
If you are a website owner: starting today, all free plans will get access to Security Analytics for their zones. Additionally, we are also making DNS Analytics available to everyone via GraphQL.