Create a second registration page in the CMS pages section. In the advanced settings of the page include a unique page route and the lava for the slugs etc. It will look something like this:
RegistrationB,RegistrationB/{CampusId}/{GroupId},RegistrationB/{Slug}
When this page is used for a registration they must include the unique page route in place of the regular registration/ page route.
*As of 2/2024 Obsidian does not work with payments.