How to make jetpack mobile show posts as excerpts instead of full posts

Hi,

Does anyone know how to set the jetpack mobile theme to show my posts as short excerpts instead of the full post? I use category pages to organize my content, but all of my posts are showing in full length. I would like it to only list the title and a short excerpt. It does this on desktop, just not mobile. I’m using the access press ray theme. Here is the site: https://www.circuitbasics.com, just click one of the four boxes on the home page to get to one of the category pages. Thank you so much for any guidance!