Increasing milk supply?

So

Do you ladies have any methods how to increase milk supply? Anything you’ve tried that has worked. I’ve been trying to start pumping about twice a day in between feeds. I barely get 2 oz from both breasts when I used to pump 8 oz like 2 months ago. He’s also feeding a lot more almost every hour, seems like he’s hungry.

Currently been trying to eat more oatmeal, drink more water, drink Mother’s milk tea here and there, and occasionally lactation cookies.