Can we get an option to select expansion slot when installing games from XBOX app and not...

This expansion was released 16th of April 2019 so a year ago. Make sure that you have installed the content. You can check that by going to My Games & Apps, selecting the Trials Rising and pressing the menu button on the controller. From there select "Manage
Game". From there you can see if the expansion pack has been installed.

If the is not installed you should see it in the Ready to Install section.

If it's installed, it might require some kind of advancement in the game to be able to play the levels. One option is to contact RedLynx through their social media to verify how to access the content.

EDIT: NeoDan123 post has some information what is required to access the levels.

Head over to my games and apps, click destiny and select mange game.

See if expansion 1 and 2 are under the ready to install tab from there.

Can you install one of the titles you're trying to install from the Xbox (Beta) app without issues?

If so, then I'd recommend we try Settings > Apps and then find the Xbox (Beta) app, select it and click "Advanced options" and then click the "Reset" button. See if that does the trick.

on the Home Screen select My Games and Apps

then select Full Library in the left panel

select Xbox Gamepass from the options on the right

then you can filter from All Games, Installed, or Ready to Install.

also check that your Gamepass is active at https://account.microsoft.com/services/

The content is contained in the winter pass, you own this purchased content, right?

https://www.microsoft.com/en-us/p/winters-expan...

manage the content installed here and see if it appears

Go to "My Apps & Games", select the game and press the more options button. From the list, select "Manage Games and Addons" and see if everything is installed