Researching about it I found this post confirming that the hook after_ui_frame Logic is depreciated. With this information I understand that the way to implement this is by Setting Up a Front-End Extension Module to later add a custom widget for example. To this end I try this command which is the first one in the Setting Up a Front-End Extension Module guide.
ng g app myExt --projectRoot=extensions/my-ext/app --routing=false --style=scss
But i get this message
DEPRECATED: The 'defaultProject' workspace option has been deprecated. The project to use will be determined from the current working directory.
Error: Unknown argument: projectRoot
Angular CLI version is: Angular CLI: 14.0.4
As I read in the compatibility matrix publication, the version of Angular is 12+
How can i solve this problem?
update 0
When trying ng g app myExt --routing=false --style=scss --path=extensions/my-ext/app I get this message Error: Unknown argument: path
Regards