You can create bulleted or numbered lists in text elements very easily.
Simply click on a text element and select Edit text. Then, click on the List icon and choose if you want bullet points or a numbered list:
Note: This feature is supported only for text elements that are written in paragraph style.
Here's a workaround that allows creating a list of headings:
Create a list in any paragraph style.
Select the whole text.
Set the preferred heading style.
Note: If you've created a list of headings and don't want it to be a list anymore, firstly select the whole text and set it to any paragraph style. Only then you'll be able to open the list settings.