Can I specify export length of multiple selected tracks?

I have a few song tracks that I’ve recorded of my band and want to have them appear as “live” recordings. So I also have a long track of background crowd noise which I want to overlay all my exports. Finally I have an “applause” track that I move to the end of the selected song track.
I then select one of the songs, background, and applause tracks for export, but is there any way to specify the length of the export since I only want it to go a few seconds beyond the applause track? I’d rather not have to resize the background track for each export too.

Use Export Multiple, making a region label for the section of all three tracks you want to export.

Files for each region will then export all at one go.

There is no need for the selection to be present in all tracks.