Activate CRM App
Make sure the CRM module is installed and active in your database.

Enable Leads (optional)
Go to CRM → Configuration → Settings

• Enable the "Leads" feature under Leads & Opportunities if you want to separate them from Opportunities.

Open Events Module
Go to Events → Configuration → Settings

Enable Lead Generation

• Look for the option: "Lead Generation"
• Tick the checkbox "Create leads/opportunities from event registrations"

Create or Edit an Event

• Under the event settings, you’ll now see a Lead Generation tab.
• Configure it to create leads based on registrations, specific ticket types, or attendee criteria.

Automatic Lead Creation

• Once someone registers for an event, a lead/opportunity will be automatically created in CRM based on the config.

Hi,

Please refer to the following link:

1. https://www.cybrosys.com/slides/lead-generation-in-odoo-18-event-module

2. https://www.youtube.com/watch?v=I28Mdj2Taas

3. https://www.odoo.com/sl_SI/slides/slide/lead-generation-events-appointments-and-website-visitors-5581

Hope it helps.