Hey Katyvin,
If you want to use the play axis in the stacked column chart first you need to install the play axis. Here are the steps you can proceed with:
Step1- Go to ay browser and type "store.office.com"
Step2- Click to "Power BI" on your left-hand side.
Step3- Click to "Search visual for Power BI" and type "Play axis" in the box.
Step4- Select button for play axis(Dynamic slicer).
Step5- Click on ADD.
Step6- Click on Download to play axis.
Then you can start using stacked column using your data set.