Depends on the puppy
Watson who is about a 20 lbs six month old Basenji (a fairly active little guy) can handle some serious exercise. He is best if he has an opportunity to run the zoomies (as we call them) out, which means some off leash running. We sometimes accomplish that with recalling him back and forth between me and the BF in a safe area of leash.
Take her out and let her tell you how much she needs... If she shows signs of tiring time to go and rest
She is little, but she his a high energy combination. If you have any places you can take her and safely let her exercise off lead you can play recall games with her and teach her something while exercising.
I would start of with at least 30 minutes of exercise once or twice a day for her and build up from there if she seems to need more.