The way to go is:
:tab sball
From the help:
“sball: Rearrange the screen to open one window for each buffer in the buffer list… When the |:tab| modifier is used new windows are opened in a new tab, up to ‘tabpagemax’.”
Without the |:tab| modifier, it open each buffer in split view.
:sball
or to open at most 6 of them
:6sball
etc.