SAP Business Network
The new feature is available with only one template (Trading Relationship Request letter (SAP Trading Network). This template should be activated.
If a buyer does not already have a logo in their Company Profile and does not add one before sending any business relationship request, suppliers will go to a registration landing page with no branding (No buyer brand logo / No SAP Brand logo).
The new registration template is not available in test accounts. The new template is only available in production accounts.
The existing templates are all available in test accounts so you can expect the same behavior.