CKEDITOR 5: Not able to read the custom attributes set on <drupal-entity>

I would recommend custom attributes to be injected in the data-embed-settings instead of their own attributes. You get the JSON ecoding for free and you don't need to add allowed attributes to your filters.

Hi @dave Thank you for the suggestions.

Actually the problem that we are facing is for existing content where we have those attributes set already like :
<drupal-entity data-entity-url-title data-no-margin data-entity-url-target>

now the problem is when we move to CKE5 , the users are not able to see the changes controlled by the attributes above, as they were not moved under
data-entity-embed-display-settings automatically .

The idea is there should be a way to migrate the existing attributes to data-entity-embed-display-settings to support the existing functionality.

Thank you !

Updating the patch for D10 compatability.