Step by Step Guide to Open APK Files in Android, iPhone, Mac, and Windows
Step1- Go to the applications and notifications section in the settings
Step2- Now, Click on advanced menu and select special app access
Step3- Select Apps and Notifications in Settings.
Step4- Go to security options from the settings menu.
Step5- You may need to provide permission to a certain app. Alternatively, you may see the option to allow instals from unknown sources or unknown apps