Category Blog layout intro text area -Solved

I the intro text area I have a 2 column row. This is perfect in my single article display. The blog layout desktop display maintains the 2 columns, however I would like the blog layout to stack the first block on top of the second like it does in the mobile display (while still keeping my 3 columns across in the desktop display). Ideas on how to do this (I am using Pagebuilder CK and Template Builder CK)
So attached image.

Hi
I don't realy understand the problem, please give me an url to check that
are you using the blog item from page builder, or the blog layout from joomla ?
CEd

I thought for sure I had followed up on this, but I guess not. The answer was to use the "read more" in PageBuilder CK and not the default Joomla one. Thank you ! this is solved.