Previously able to restrict apps visibility to specific users or user groups using the 'Limit Visibility' option through the app properties. Now all company's users can see all apps when logging to the Cloud Workspace.
App visibility can be set in Citrix Cloud through the app properties as per https://support.citrix.com/article/CTX250083, but in this scenario, the Delivery Group was set to be 'Managed by Citrix Cloud' which only allows to limit app access through the App Library.
The option here is to recreate the Delivery Group without 'Managed by Citrix Cloud' option or to create a new one pointing to new VDAs, publish the apps desired, and add only the users who need visibility.