I downloaded a bathtub from the 3D warehouse, and when I went to put it in my model all I could see was the wireframe boundary box - no geometry inside. I clicked to place it and it disappeared. I have tried turning on “View hidden objects” and “view hidden geometry” and nothing shows up. I know it’s still in my model because I can see it in Enscape (idk if any of you use Enscape) - please see the screenshot attached.
If you have Profiles turned off and face style set to Hidden Line, this thing would disappear because it edges are all softened or hidden. Here I have Shadows turned on. Without them it would be visible at all.
Another thing to check in your model is that your model is correctly dimensioned. The component seem to be the model at the right size but if your model is drawn larger than life size, the shower might not be visible at all. Recently a new user was having problems with components not showing up. As it turned out they had created the model such that the building was over 1000 miles tall.