WTH is there no way to resize cards?

Creating a dashboard for mobile use is such a chore when there is no easy way to resize cards or tell them to use full, 1/2 or 1/3 size of the device.
E.g. I want to display open windows when walking by a tablet at the exit to my home. Sometimes it’s one, sometimes 4 and so on.
The cards are so small that it’s not easy to see which one it is at a glance.
Would be a breeze if I could say: when only 1 use 100%, when two use 50% per card and so on.