Prism Central Image Service allows you to upload and manage images through Prism Central by using the v3 API. You can also choose where your images will be available across different clusters123
https://next.nutanix.com/ncm-intelligent-operations-formerly-prism-pro-ultimate-26/prism-central-adding-images-to-prism-central-33759

Frame is a cloud-native desktop-as-a-service platform that allows you to deliver virtual desktops and applications from any cloud. Frame supports multiple public clouds, such as AWS, Azure, GCP, and Alibaba Cloud2. You can bring your own public cloud account and use Frame to provision and manage your virtual desktops on demand.
Frame also supports Nutanix private cloud model running AHV, which is a native hypervisor for Nutanix Enterprise Cloud Platform. You can use Frame to deliver virtual desktops and applications from your own data center using Nutanix AHV clusters3. You can benefit from the simplicity, scalability, and performance of Nutanix hyperconverged infrastructure.

A mandatory profile is a type of roaming profile that is read-only and does not save any changes made by users during their sessions. A mandatory profile can be applied to a group of users who share a common desktop environment and do not need to customize their settings or preferences.
A mandatory profile can ensure that a group of base settings are applied to Citrix-based VDI users at each logon, regardless of any changes they make during their sessions. A mandatory profile can also improve performance, security, and consistency of the VDI environment.
To use a mandatory profile with Citrix Virtual Apps and Desktops, you need to create a template profile on a reference machine, rename its NTUSER.DAT file to NTUSER.MAN, and copy it to a network share. Then you need to configure Profile Management policies or Active Directory settings to point to the network share location for your users2.