game shortcuts on gamebar on windows

That's a pretty interesting idea actually. Make sure to hit up that feedback page already linked to you!

Sort of like a Recently Played list? It's not a bad idea, and you should post it over
on the Xbox Feedback website! I don't think that I personally would use it. I think they are designing the dashboard to be a get, do what you need, and get out sort of function. And
I think adding too many things could easily clutter it up, though they do pack a lot on the screen logically with the updated Game Bar stuff.

I also asked if they plan on opening an API to allow developers to create their own "widgets" like Spotify add in to it, and they said they have discussed it, and considered it, with no plans to implement now, but definitely not ruled out for future update.

Yes, that would be nice...

more like my games and apps but can launch games without having to open steam or epic etc and find the game and launch it instead just press windows + G and then launch a game straight from there

That would be pretty useful.