The Emacs Org Agenda supports several different views with different time ranges such as day, week, fortnight, month, and year along with custom ranges through the org-agenda-span variable (https://www.gnu.org/software/emacs/manual/html_node/org/Agenda-commands.html).
I prefer setting org-agenda-span to 10 days instead of the default week view as I don't care for past days and find 10 days to be a good range for my future tasks to be aware of.
Would it be possible to add a similar setting to the beorg agenda view?
A possibility for the future is for you to define a beorg view - which would combine search and a specification for how items should be grouped (e.g. by day, file, priority, etc). No ETA yet on this but adding this would make a number of higher level features much easier to implement - as well as being something power users could really get their teeth into.