Hi Craig,
Thanks for reaching out to us!
When I try to add a ticket to an events I only have the RSVP option (and it is already checked and you cannot un-check it) Where is the woo commerce option?
From what I see in your system information you have not installed Event Tickets and Event Tickets Plus, you’ll need both of them for WooCommerce Tickets to work. Take a look at this article for more info on this: Moving to Event Tickets Plus.
Also when we select 20 events to show on the events page it does not show all events. We are using the Divi theme.
Most probably Divi archive settings is causing this as the Event Views are archives. Head to Divi > Theme Options > General Settings > Number of Post displayed on Archive pages and change that number to 20 as well.
Please let me know about those,
Best,
Nico