How to capture runtime parameters with extended event?
If the procedures are being called, you should absolutely see the parameter values in the 'statement' column. I have a blog post that demonstrates exactly this issue. There's literally nothing magical to make this happen. It's just a part of the statement.
Now, to make the statement appear in the grid in the Live Data Viewer, you can either right click in the details pain and select the menu choice to show the statement, or, you can select the column picker from the toolbar. Here's a video showing how that works.