We have apigee version 4.19.1.0.6. As its on-prem model so already have Drupal 7 dev portal in the apigee default installation. We need to upgrade from drupal 7 to drupal 9. Is there a guide/reference docs?
Thanks in advance
Here is full documentation Apigee Devportal Kickstart Distribution
Specific to your question here is the reference to migrate Drupal 7 developer portal entities