Gen AI Summary of Knowledge Article Not Appearing

We are trying to enable the below feature for the Gen AI summary of a knowledge article when sharing with the employee in HR Help Desk:

Include the Generative AI summary of a Knowledge Article when sharing with the employee

It is my understanding that Gen AI features are automatically available and enabled for all users in Help Desk as of 25D, so I would expect that a promotion code is no longer needed. To confirm, we have also enabled Knowledge in Redwood. Aside from that, I have completed all of the necessary steps to enable this feature:

• Enabled Generative AI features in Help Desk under Enterprise Offerings