If you've followed the steps above and don't see any history, the most likely culprit is that you aren't logged into your Google account. Whether you're signed into the wrong account, or you aren't signed in at all, tap on the profile icon in the upper right-hand corner and tap the option to Add Another Account. Another problem may be that you've set your history for automatic deletion. This account change is done on the My Activity page. Google lets its users turn off the history for their accounts. No history will appear because Google isn't storing your search history if this is turned off.