This includes:
Block Generator; Breaks an unlimited amount of a certain block.
Lightning Axe: Whatever mob you hit will suddenly be struck by lightning.
Rideable pearl; Once you throw a pearl you will experience the view it has. (best in first person)
Boots that take you above the clouds; Some say once you jump you'll never come back down. Once you're done using them use effect clear (user)
Levitator; This will bring you up to a certain Y level. I like to think this as a futuristic elevator.
┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉┉
Feel free to copy any of these commands. You do not need to ask me for permission.

I did not make any of these commands and I do not remember the videos I got these commands from because I made this when 1.17 just came out.
If you know any of the videos please leave the link in the comments. (: