When adding widgets to a page using to a Service Portal designer and the designer doesn't show the widgets added to the page.
URL parameter dependency
Some of the widgets might have URL dependency to be able to load the required resources, due to which these widget might have anything to display and shows up as they are not added to the page.
Please check the necessary page record from "sp_page" list or test by using the necessary URL parameters
If you are using Order Guide Widget, Please test by using the following URL