Almonds and walnuts are your besties yaar. Throw in some pista if you like. Dont overthink the exact list, just a small handful of any good nuts daily is great.
My saasu maa soaks almonds and walnuts every night for me, says it's a must for the baby. Honestly it became a nice little routine. Just keep the quantity small, she gives me only a few.
Badam aur akhrot are the classics, both very good in pregnancy. Keep cashews a little less since they are heavier. Just one small mutthi a day, dont overload your tummy.
Go for almonds, walnuts and pista mainly. Soaked almonds in the morning, walnuts for the good fats. A small handful a day is plenty, more than that just adds heat and weight.
My pregnancy app actually had a section on this, it listed walnuts and almonds top for baby's brain development. I started keeping a small box of mixed nuts in my bag for snacking. Just watch portions, the app reminded me a handful is enough.
