Here's the links that Ben referenced during the June 2023 Office Hours:
API Products tech docs
https://techdocs.broadcom.com/us/en/ca-enterprise-software/layer7-api-management/api-developer-portal/5-2/manage/manage-plans/introducing-api-products.html
Gateway Non-GA Features page in tech docs (includes links to community portal or tech docs)
https://techdocs.broadcom.com/us/en/ca-enterprise-software/layer7-api-management/api-gateway/11-0/release-notes/gateway-non-ga-features.html
Graphman - Getting started with Postman
https://imsacademy.broadcom.com/catalog/courses/3095621
https://www.youtube.com/watch?v=WeBFRjSG26I
Graphman - Getting Started
https://imsacademy.broadcom.com/catalog/courses/3078069
Graphman - Migrating a Service
https://imsacademy.broadcom.com/catalog/courses/3095554
https://www.youtube.com/watch?v=W8pW_9S-8F8
Graphman - Create a Custom Query in Postman
https://imsacademy.broadcom.com/catalog/courses/3085811
https://www.youtube.com/watch?v=-x0wu7Ohj20&list=PLO7SodxCJyn5PbT7kpjbN6HPtyjdMneeW&index=17
Gateway WebSockets Preview Feature (Module 5 of this IMS Course)
https://imsacademy.broadcom.com/catalog/courses/2915460
Config as Code using Graphman and Layer7 Operator
https://www.youtube.com/watch?v=vm3XsujDDGA