Running 21.4 and have published a couple of Apps in Automation Cloud, and have created and deployed a policy in Automation Ops for my user to be allowed to use Widgets in Assistant.
In Assistant, I use interactive sign-in, and the user is assigned an Attended license in Orchestrator.
Also, all users in my organisation is permitted to access the Apps per the settings in the Apps.
But…
In Assistant, no Widgets are visible at all. I have signed in and out, quit the Assistant altogether and restarted, rebooted, walked the dog and everything else imaginable. Still no widgets.