@Maximiliano Gibert Thanks for reaching out.
The document calls out that it applies for consumption logic app. I will pass the feedback to the content team to update it for the standard logic app.
As you are using the standard logic app so you can create the action first and then under the setting you can update the Run After behavior for that action and add another action so it should automatically join the branch. For your reference sharing the gif.
Let me know if you need any assistance.