Having a callback variable with an index

[Keith_1357]

I think I understand. You can return a structure variable. Give the function an ID and return a variable with as many children as you need. It could return any values in the provided parameters.

Is it possible to get argument instead of variable name in extension?

They recently added some new features. If you setup a parameter as a scene variable (last in the list of parameter types) You can then set another variable to the that variable using copy variable to function parameter under [other] conditions [Event functions] This only works with scene variables but it seems to work with all variable types like arrays and structures. There’s also an action to do the reverse. For a global variable, I think you would need to use JavaScript. [20230528_234322] …

For you or for other readers.
https://wiki.gdevelop.io/gdevelop5/events/async/