My mother-in-law used to insist on having ragi porridge and curry leaves everyday for iron. I took her advice but also checked with my doctor who gave me a proper trimester-wise diet chart. Traditional foods are great, but balance it with your doctor's advice too.
Honestly, instead of asking online, you should get a customized diet chart from your gynac. Every body has different needs, especially if you have deficiencies like low iron, so expert advice is safest.
Tests and delivery packages are already so expensive these days, so I saved money by skipping those fancy 'pregnancy superfoods'. Basic things like bananas, seasonal veggies, and chana are highly nutritious and won't hurt your wallet.
No need to buy fancy expensive fruits or seeds, honestly. Just stick to basic ghar ka khana like dal, paneer, seasonal fruits, and eggs if you eat them. Milk and curd are great for calcium and super easy to include daily.
A balanced diet with leafy greens, whole grains, and lean proteins is ideal. But there is no one-size-fits-all, so your doctor or a clinical nutritionist at your clinic is the best person to guide you based on your blood reports.