SharePoint modern page, can you adjust responsive design?

Specifically, is there any way to control the window width at which webparts start to stack?

My specific situation is similar to the one in this discussion.  In my case, I have 3 tall, thin photos that need to display on a page.  I have placed 3 image webparts, one in each column of a 3-column section.  This looks fine in a wide window.  But as I narrow the window, at far too wide of a window width, the section switches to stack the "columns," leaving the user looking at the top 25% of the first photo only.  (Which not surprisingly is pretty useless; one needs to see all of a photo.)

In both my case and the previous discussion, the problem is that the responsive design thresholds are far too wide (often wider than the physical computer monitor that some are using).  Is it possible to fix the thresholds?