I'm having the same issue but with iOS 15. The label of the Picker simply doesnt work as expected in iOS 14.X
I already tried many things but nothing seems to work.
Picker(selection: $selectedValue, label: formFieldDropdown,
content: {
ForEach(dataSource) {
Text($0.displayName)
}
})
.pickerStyle(MenuPickerStyle())
iOS 14.X
iOS 15