We have a few different options for recurring / multi-session events in Luma.
You can create a Luma Calendar that lists multiple events on the calendar page. This is great if you have many events. Note that we don't support bulk registration for events.
If you have events that are related to each other, you can paste links to other events in the event descriptions. That allows people to really easily navigate between events.
If you have just a couple different sessions on the same day, you can create different Ticket Types on one event and then ask people to book the ticket that they are interested in.