blank screen when apk is installed on phone

I finished my unity game and got an apk build But when I install apk on the phone, the screen is completely blank. There’s a screen like the first one that comes out when a new project is done.

From the information you provided, I guess that you didn’t add the scene to the build settings. Open the scene everything is in, then press File>Build Settings and click “Add Open Scene” and make sure it’s marked with number 0