EA Play through Game Pass Ultimate

Is this on the console or PC? EA Play is included on the console with Game Pass Ultimate. EA Play will be available on the PC through Game Pass sometime this year.

The Sims 4 is not included with Game Pass. You can play the game through EA Play which is included with Game Pass Ultimate, but it's not actually part of Game Pass.

From the
Game Pass FAQ:

What will happen to my subscriptions if I already have both Xbox Game Pass Ultimate & EA Play on Xbox?

When the EA Play member benefit unlocks for Xbox Game Pass Ultimate members, users who have both Xbox Game Pass Ultimate and EA Play purchased through the Microsoft Store will have their EA Play membership canceled and any remaining time over 50 days will
be rounded up and converted to the nearest month of Xbox Game Pass Ultimate at a ratio of 3:1.

For example, if you have between 50 days and 3 months of EA Play already on your account when EA Play comes to Ultimate, you will have 1 month of Xbox Game Pass Ultimate added to your account. If you have between 4 months and 6 months of EA Play already on
your account when EA Play comes to Ultimate, you will have 2 months of Xbox Game Pass Ultimate added to your account.

Because you're located in a region where Game Pass is not available. EA Games like FIFA and Battlefield aren't available in Game Pass itself, but are available through EA Play which is giving by having Ultimate. If EA Play isn't available in Pakistan, that would be why you're not getting those games.

1) No.

2) If you purchased the games, you won't lose them. If you downloaded them for free through EA Play, you would no longer be able to play them with an EA Play or Game Pass Ultimate subscription.