How to increase milk supply while pumping????

Arin • Hadley Noelle 12/12/20💗married 7/15/20💍 Angel baby 8/9/18👼

For those who are pumping. How do I increase my supply? I pump every 2-4hrs(for 20-30min) but only produce 2oz per session(3 if I'm lucky). My baby is now eating 2.5-3oz every 2-3hrs and I can barely keep up. I've tried lactation cookies and funegreek supplements. Both of which don't seem to make a difference. Any ideas?