If these icons do not show on your theme, maybe there are some steps to be missed.
Go to Theme settings -> Header -> Other -> Search widget -> Choose “dropdown” or “full screen” option
Go to Settings -> Checkout -> Choose “Accounts are optional” option
+ Go to this link to install Wishlist app: Wishlist
+ Create a wishlist page with Template: page.wishlist
+ Then go to Theme settings -> Header -> enable “Wishlist icon”