Add Child Widget asset list blank ?

I’m trying to have 1 parent Widget and dynamically change depending on circumstances. This is probably not the way to do it but the parent is just a blank Canvas Panel and then by blueprint want to fill it with another widget of choice. I found “Add Child Widget” which has “target Canvas Panel”, however trying to find content asset list is completely blank ?

Edit: As the case usually is I found some answer just after posting … Used “Create Widget” for the asset in the parent which hooks up nicely.