Show Data of hidden Datasets in Tooltip

[CarmenUZH]

Hello everyone!
Im working with Chart.Js v3.
My Chart has multiple datasets, and all but one of them are hidden.
I want to create a tooltip that shows the data for every dataset (even the hidden ones) but i don't know how!

There are solutions online but these are all for v2 and dont work for me
( see: https://stackoverflow.com/questions/61419837/chartjs-show-hidden-data-on-tooltip or https://www.appsloveworld.com/chartjs/100/8/chartjs-show-hidden-data-on-tooltip-source-code)

Could you please help me figure out what i need to do?
Thank you!

[CarmenUZH]

To anyone struggling with the same thing, here is the solution I found:

(please note that i removed the first item, you can just return "result" instead)