How does the AEs content auto-populate for different types of leads?
This article explains which workflow(s) auto-populates prefilled text that's used AEs (AE1 and AE2) personalization.
German AEs
In this workflow, there's a branch for each sport. Under each branch, the text, links and links text content populate in their designated properties once the contact is created in HubSpot and meets the enrollment criteria, which are then used in the preset email templates.
Example
In the diagram below, we see that the workflow automatically populates the link and the text appears in the hyperlink in AE1 - P4 (Paragraph 4).

Also, there are other workflows for English, French and High School contacts.