Thanks, I think I understand. You want the document to automatically be set to Approval In Progress once it has been created. I think it should be possible using a custom event in some form. The challenge is to find a good "triggering point", something that happens at the last moment. If it cannot be found, it might be enough to find some triggering point in the middle of the document creation flow, and use a custom event that created a background job which will set it to Approval In Progress. There are at least a couple of posts here on IFS Community that discuss how to create a custom event that does things in the background. I think if you search for the word "mutating" you will find some, because it's been discussed in the context of "mutating tables".
Good luck!