Copy video collage to Expert mode

Hi, 

After creating a video collage in premiere elements 2020, is there an option available to transer it to the timeline in Expert mode or is the only way to include it in a movie: export to mp4 file format and drag it to the premiere elements 'expert' mode project ...

I noticed it is not possible to drag a vc file to the expert mode time line.

Thanks in advance for your help!