Seems like I figured out myself. I had to do 2 things.
- In my Settings-Panel’s Graph, I had to use “OnActiveWidgetIdexChangedBP” and SetFocus to the Sub-Panel Widget
- In the Sub-Panel (e.g. “Controls” like in my screenshot), I had to define a Widget by overwriting “GetDiesiredFocusTarget”
OnActiveWidgetIdexChangedBP:
GetDiesiredFocusTarget:
Now I can switch tabs and navigate through the SUb-Panels elements afterwards.