Currently, only the default System Customizer and System Administrator roles can edit Power Pages sites. Copied System Customizer roles, even with identical permissions, no longer support site editing. This creates governance and security concerns, as assigning the default role grants access to unrelated data.

Request:  

Enable copied System Customizer roles to edit Power Pages sites when configured with appropriate permissions. This would allow organizations to maintain strict data boundaries, improve security, and uphold the principle of least privilege while still supporting site editing.