vBulletin 5 Request - Functionality to create a new thread from external script

[qmm]

Hi,

I have a type of framework on-top of vbulletin, we recently did an upgrade from 3.8 all the way to 5.5.0 for responsive forum themes
In our framework, we are able to save a new thread in the forum using datamanager through, let us say, my-codebase/save-new-thread.php where you can pass parameters, it's broken to run as is in the new upgraded forum

Is there an out-of-the-box solution to this using existing codebase that I have not yet found that can be included in the script and replace the datamanager?
I'm keen on trying to stay away from core editing and kind of new in the vbulletin codebase

Apologies if this might already be there, I have not yet found it personally or found how threads are created in the forum itself through code
Thanks in advance