Note: Make sure you are logged in and in the correct event
Select the accommodation request fields in the fields template.
Save the fields template and drag and drop them into the registration form. You can customize the roommate selector settings by clicking on the pencil in the "preferred roommate" field.
When you click on the pencil, a pop-up will appear. From there you can define what participant data appears in the roommate selection list. These can be fields like "First Name", "Last Name", "Gender" and "Email".
In addition, you can filter participants according to a custom field. For example: I only want to make participants from the EMEA region visible in the roommate list (people from other regions will be marked as unavailable to choose as a roommate).
Once the new registration page saved with the customized roommate selector, the participant, when registering, will be able to select from a list of participants the preferred roommate.