I am mostly vegan, and so this is a constant issue for me.
I add in iron rich foods all day, starting with coffee. I make a frothed latte, I add unsweetened cocoa powder to that and blackstrap molasses, both are high in iron. I also add cinnamon and nutmeg which lower sugar and improve the flavor.
That is 20% daily value.
I make a smoothie later with protein powder, more cocoa and molasses, and all the stuff like creatine, collagen, amino acids etc and Kale plus a cup of blueberries, for vit C, which doubles the bio-availability of the iron. Always add citrus to iron foods or drink while eating them.
A cast iron pan is super helpful, but a pain here in hawaii, as it rusts rapidly.
You can get an iron fish, you put it in a pot with water and it leaches iron into the water, again a squeeze of lemon added, put it into your water bottle.
Lentils are high in iron and protein, adding them to meals will help too, especially cooked with spinach and lemon.
My iron has been normal for years since I started doing these things.