I like to have new Org entries added to the start of the subtree for easier review, but org-feed appends them. Since I didn’t feel like hacking a prepend option into org-feed at the moment, I used advice to sort them afterwards instead.
(defun my-org-feed-sort (pos entries)
(save-excursion
(goto-char pos)
(when (looking-at org-complex-heading-regexp)
(org-sort-entries nil ?T))))
(advice-add #'org-feed-add-items :after #'my-org-feed-sort)