Soy lecithin granules are easily the best and cheapest increasing not only strength a host of other health benefits but gave me the largest increase in appetite
Would also reconsider however and whatever you are eating to include more dense foods and fatty meats like, AU Lamb and whole roast duck them fats are important even more so as a woman and will rack them calories up fairly quick. Could also incorporate more nut butters ( walnut, cashew, almond ) maybe heavy cream added to meals to form a sauce/reduction or even a few tbsp into a milkshake or in coffee. Ben & Jerrys or Haagan Dazs 4tw also would consider frozen custard cuz o lawd is it tasty! and a small cup is a stupid easy like 800 calories haha
I eat them things on a cut
but I suspect you are eating fairly lean meats which of course I am making assumptions - I have no idea what/how you eat.