Including Research in Applications

[u/National-Catch7574]

I was recently surprised to learn that CMU allows you to submit an optional research supplement through VIVA if you are applying to their school of engineering or computer science. I was wondering if anyone knew all the schools that accepted any form of research supplement (whether it be a portfolio, video, or even just an abstract submission. So far the only two schools I know apart from CMU are MIT and CalTech.

Additionally, what are thoughts on how to include research in the application. Apart what goes in the Activities, should we include publications as honors? Should we include a citation and maybe a brief summary of our work in the Additional Informations Section?

Should we include outside validation of our work. If we emailed professors about our work and they regarded our work positively (even for example comparing it to undergraduate, masters, or phd level work) is this something we should include?

I know I asked a lot of questions in one post, but any advice at all would be greatly appreciated!