Steam Overlay in Non-Steam Games

I have a question (sort of help I guess), how to enable Steam Overlay in non-steam games? The issue, that since I launch a game (minecraft through prism launcher) I do not have Steam Overlay right in game, it triggers the steam itself

• Additional info: Launch options: `–launch "1.20.6 (Quilt)"`

1. Video example, how it should be: wait… the Steam Deck has Minecraft?!
2. 6:28 – Steam keyboard; 6:58 – The steam overlay