Four month milk supply increase

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Recommendations on increasing my milk supply? (My right has never produced as much as my left. Always about half as much🤷‍♀️)

I'm already drinking lots of water and one Body Armor a day. Oatmeal didn't seem to help when I did that at one month for a couple weeks. I'm having to supplement with formula after each breastfeeding session. My goal is to get back to just breast milk. Is that possible at this point (four months)?