Export settings from new Cognito Managed UI customizations

Thank you for your positive feedback on the new Cognito Managed UI! I'm glad to hear you're enjoying the customization options.

Regarding your question about exporting settings from your customized Managed UI to other pools or app clients, unfortunately, there isn't a direct way to automatically copy all your customizations to multiple user pools or app clients. However, there are some approaches you can consider to make the process more efficient:

1. API or CLI approach: You can use the SetUICustomization API or the AWS CLI command set-ui-customization to apply UI customization settings. This allows you to programmatically set the customization for a specific client or all clients in a user pool. You could capture your customization settings (CSS, image file, etc.) and then use these tools to apply them to other user pools or app clients.

2. Capture and reuse CSS: If you've made extensive CSS customizations, you can copy the custom CSS values you've created. You can then reuse this CSS when setting up the UI for other user pools or app clients.

3. Image file reuse: If you've uploaded a custom logo image, you can reuse the same image file for other user pools or clients.

4. Client-specific vs. pool-wide settings: Remember that you can set UI customization for all clients in a user pool by using 'ALL' as the client ID. This can save time if you want the same customization across all clients in a pool.

While these methods don't provide a one-click solution to copy all your customizations, they can help streamline the process of replicating your UI settings across multiple pools or clients. Keep in mind that some settings, once created, cannot be changed and may require creating a new user pool or app client if you need to modify them.

For future reference, if you anticipate needing to replicate settings across multiple pools or clients, it might be helpful to document your customization choices as you make them, making it easier to recreate them later.
Sources
SetUICustomization - Amazon Cognito User Pools
set-ui-customization — AWS CLI 2.22.4 Command Reference
Updating user pool and app client configuration - Amazon Cognito