You may achieve this by running an activity from the data transform. In that activity, call another activity @baseclass.DisplaySection and pass the required parameters to DisplaySection activity. By this you may be able to load the section.
To run activity from DT, use @pxExecuteAnActivity(page name,"youractivityname") in your DT step.
Check if this works.
If you can share your requirement, we may be able to suggest other better approaches.Thanks.
Thanks so much for your valuable response and really appreciated. Yeah requirements was something like that but now business itself changed particular requirements. So, we are not implementing these scenario.
But useful insight given by vanna and others.