Increase milk supply

Hi I’m a FTM, EP, just nice supply Lo is 9mth not latching since 2mth My supply sudden drop drastically She is drinking 900-1080ml per day When recently my supply is 700 per day Now using freezer milk. I tried power pump, fenugreek, lactation cookies but still no use. My breasts feel empty… I’m desperate for milk!!! Any more ideas on how can I increase my supply? I hope to give her BM till 18mths