Checking if a key is not being pressed

Is there a way to detect if someone has let go of a key, for example I can use keyboard.asyncdown to see if they press a key, however I need to know when they let go?

For example someone is holding A down and then holds RETURN at the same time, they may let go of A, but I need to know if they let go of the RETURN key?

Is this actually possible

I believe you could do that with a 100 ms multiple timer and the keyboard class.

You can check which keys are pressed, and detect when they are no longer pressed. So you have the release keys.