Hi there João,
Thanks for getting in touch and for your interest in our products!
‘Attendees meta’ is how we call the feature you are asking about, and it will most probably be included in next release 4.1 coming out next month. This was not a feature of WooCommerce Tickets. As a work around is possible to ask for more details on the checkout but that should be addressed from WooCommerce or the e-commerce platform in the site.
So to sum up, this will soon be a part of Events Tickets Plus! Stay tuned to our releases notices via newsletter subscription at the footer, or follow @TheEventsCal on twitter.
Please let me know about if there’s anything else I can help you with,
Best,
Nico