Xbox games on the laptop play?

Can I also play my Xbox games on my laptop? Is that also possible when my son plays xbox and I play another game on the laptop? I have the xbox app under win10

Unfortunately, you would have to buy them again and they are only available in the Microsoft Store and are usually overpriced. Is it about playing together or showing the trophies that can be played in such a way on your xbox account? Because if not there are enough other platforms where you can buy games for cheap money. Ex: Steam

I just want to play on my laptop. Eg my son plays Fortnite on the xbox and I play gta on the laptop at the same time. Account but both the same from the xbox. Is that possible?

No, unfortunately, this is not possible unless you buy the game on the pc - you would have to start over