Hi Mahesh,
Please be ware that the feature may only supports with self hosting event website.
You can add custom tab in event.component.html.(src\app\components\event)


However, those tabs are integrated with event service, and autually the content are different components(session, speaker, pass information) page,
so
1. Add your custom page with component.ts file in a folder under event folder.

2. Import custom component to routes.ts to give a link to custom page.

(path in event children node, the upper link is just for page display test)
3. Add link to [routerLink] attribute in event.component.html and keep [queryParams]="{id: readableEventId }"(it's very important because the parent page(event registration) need this parameter on init)

Result:

Now you can extend your own customization on custom html page.
Regards,
Clofly