TLDR; Can you give more real estate in VSTO to MS Project Desktop Add in then a little Ribbon control?

I was working for the first time with a VSTO add in and the tutorials I think are older which I expect, but even so I am not finding any help for the UI portion really: https://learn.microsoft.com/en-us/visualstudio/vsto/walkthrough-creating-your-first-vsto-add-in-for-project?view=vs-2022&tabs=csharp

I was able to put in a new item in my project and it shows fine

Ribbon (Visual Designer)

Is it possible to a larger area pane to show with VSTO? I was looking at the tutorial and it just basically inserts a task and mentions nothing on the UI but the ribbon. Is this all there is you can do graphically? I just really wanted to give more real estate and do some dropdowns and buttons to call a service I made. I can do that but it looks very small:

Is there any way to at least give more real estate? This is for a Project Professional Office 365 Desktop? I have created a whole WPF User control and I thought I read you can wire that up but it never shows. Do you have to do something with the

ThisAddIn.cs

I feel like I have read a lot of data, but have not found a simple tutorial on the UI portion of what Project can do. I can do the Ribbon but I thought I read somewhere that the Add Ins can take a WPF or Winforms UserControl. I just don’t know how to wire it up.

As always, any help is much appreciated.