can i create assistant page without using IFS developer studio?

Hi there! I've explored this as well. The short answer is: Yes, you can create it, but you might hit a dead end when trying to use it.

How to create it:
You can actually add a new assistant page via the "All Pages" tab in the Page Designer.

The catch:
The main issue is the "Trigger." So far, I haven't found a way to call or open these custom assistant pages from another page (the way standard IFS Core pages do).

Since there’s no clear way to link it to a button or a command in the UI, you might end up with a page that exists but can't be accessed by users. Unless someone in the community has figured out a workaround using Workflows or custom URLs, it might not be practical for now.