The planner is very tricky. I don’t know exactly how it works. The help page says that sometimes it’s an approximate order; it works itself out. So it’s difficult to know the exact order, as it changes literally every minute, depending on the answers.
So, to be able to review or even view and memorize the cards from the overview, say, urgently before an exam, I created the add-on https://ankiweb.net/shared/info/1188253433
Although if the order isn’t that important, a filtered deck is also suitable.
Oh, I forgot to clarify. I’d look through and select cards, specifically cards, flagging them, say, red, as urgently needed. Then I’d go through those cards with a filtered deck, and until I’d learned them all, I wouldn’t select the next 10.