How do you add a template for split screen to Adobe Premiere Rush?

Community Beginner ,

I saw a YouTube video where 3 video clips were added into one screen and split between 1 template so the video plays as one with 3 different videos in one. He added a template which I think was a png file but in description it was a link to adobe express template. He then imported it via media along with video clips but I can't see a way of downloading and importing this template into Rush? Below is link to the video. Does anyone know how to get this template into Rush or another template that will do the same thing? Thanks

https://www.youtube.com/watch?v=Pv2i_sIMAaU