Thank you for reaching out and for explaining your use case in detail.
We apologize for the inconvenience. At this time, it is unfortunately not possible to exclude the currently viewed (featured) item from the dynamic collection on the detail page, nor is there an option to randomize the order of the items within the collection. The system will always display items based on the default ordering rules.
We understand how this limitation may affect your desired layout and user experience, and we truly appreciate your patience and understanding. Your feedback is valuable and will be taken into consideration for future improvements.
Please feel free to let us know if you have any other questions or need further assistance.
Kind regards