All my games are not in my library.

Hi, I hope you're doing great out there. I am an Independent advisor and I am here to help you with your concern.

We need to make sure that the games are successfully purchased under the account that you're using, please follow the steps below:

"Go to Profile & system > Settings > Account > Payment & billing > Order History"

https://support.xbox.com/en-US/help/subscriptio...

Once confirmed kindly remove and re-add your account by following the steps below:

"REMOVE ACCOUNT​​​

​​​

1. Press the Xbox button to open the guide. ​​​

2. Select System > Settings > Account > Remove accounts. ​​​

3. Select the account that you want to remove, and then select Remove to confirm. ​​​

4. When you're finished, select Close. ​​​

​​​

POWERCYCLE CONSOLE​​​

​​​

1. Turn off your console by holding the Xbox button on the front of the console for approximately 10 seconds. The console will turn off. ​​​

2. Turn your console back on by pressing the Xbox button on the console or the Xbox button on your controller. ​​​

​​​

ADD ACCOUNT​​​

​​​

1. Press the Xbox button to open the guide. ​​​

2. Select your gamerpic in the upper-left corner of the screen, move all the way down and select Add new. ​​​

3. Enter the Email address and the password.​​​

4. Read the Microsoft Service Agreement and Privacy Statement, and then select I Accept. ​​​

5. Follow the steps to configure your Sign-In & Security preferences to add your Microsoft account to your Xbox console.​​​"

Would that delete all my games? Like not from my library, but permanently?

Yes there are more than one account on the console but I own all of the games as the other accounts are family accounts and all games get installed under my account. The only Games I have hidden are 5 Demo games which I have noted under the Hidden Games
element.

But none of that would explain why there are 20 more games in the My Games and Apps section and yet there are 20 less in the Full Library section. Surely the Full Library should have more as is called the FULL Library, not Partly Full Library, or Nearly
Empty library.

My games & apps > Full Library > All owned games

Hello again

Let me clarify. I did all the proceeding steps. I can NOT find it in my Library. It is GONE from my library. It has ALWAYS been in my library but now it is gone.