[New Blog Templates] How to get new blog templates templates showing one column on mobile devices

On new blog templates, I have a "template page" enabled where users can view the templates that we offer. On mobile devices, the page looks really bad because it forces two columns for all the templates. Tried to fix it with "column-count" CSS but it wasn't working. Makes the UX really poor and I don't want to lose conversions since about 60% of my website traffic is mobile.

View the photo below to see what I mean. If you look at "Template 3" that's how it looks when a user clicks on the template on mobile. https://i.imgur.com/fZoCox1.png