When you use Google for your email—as well as for search, maps, and more—there are a number of security and privacy options you can set. Google has a full set of tools you can use to check and tweak your security settings, for both Gmail and for the rest of its services. Begin by going to myaccount. Start with the Security Checkup this may display Security issues found, if there are issues you need to check. Click Secure Account in that section, sign into your account, and follow the instructions. In my case, Google tells me that there is an issue found, and asks me if I still need to use the app password for the Mail app on my Mac. I found a few.
Help with Security
Manage your Google Settings
Important : Settings can vary by phone. For more info, contact your device manufacturer. If an app isn't made by Google, you can delete its app data from your Google Account.
Settings you can change
Sign in to your Google Account, and get the most out of all the Google services you use. Your account helps you do more by personalizing your Google experience and offering easy access to your most important information from anywhere. Your Google Account is protected by industry-leading security that automatically helps detect and block threats before they ever reach you.