If the search bar is missing or was accidentally removed, you can easily restore it: : Long-press any empty area on your home screen. Tap Widgets at the bottom of the screen. Scroll down to locate the Google app category.
an empty space on the home screen until the apps jiggle. Tap the + (plus) icon in the top-left corner. Search for Google and select the widget size you prefer. Tap Add Widget and hit Done . How to Customize the Widget (Android) Google Search Bar Widget
You can change the appearance of the search bar to match your phone's theme through the Google Help Center : Open the on your phone. If the search bar is missing or was
Select the widget, then tap and hold it to drag it onto your home screen. iOS Devices (iPhone/iPad) : an empty space on the home screen until the apps jiggle