RE: Customer Journey & Events relationship
Hey nkhemji,
While designing a customer journey, you can drag and drop the event tile into the journey and set it up as a trigger source tile - which means you can add triggers after it (did the contact register for this event, did they attend the event).
To see which emails for a particular event were sent out, please navigate to the customer journey that you set up for the event, and on the insights section, you'll find the email KPIs which tell you how many people have been sent emails, how many emails were blocked etc. Here's the documentation around Customer Journey insights - docs.microsoft.com/.../insights
We do not create an implicit relationship record between a customer journey and an event that can be accessed by users.
Regards,
Shravan