PlayerLadder

Adds the ability to ride/pick up other players on the head by right-clicking on them.

In 1.19.4+ gives the ability to mount entities on players by using /ride.

You can also install it on the client:
In 1.20.1: it will offset the rider in the first person.
In 1.21+: it will give you the ability to interact with the world when someone is sitting on top of you.

To enable Pick Up Me functionality, you need to switch rightClickMode to "PICK_UP"

Only the latest version of Minecraft is supported.