You should be able to select your element in plan, right click and click Show Selection in 3D. Then, once in 3D, select the element (which should be the only thing you see), right click again and click Show All. That should reveal everything in 3D, and still have your element selected.
Archicad 24-25 SWE
Dell Precision 5560, Windows 10 Pro
11th Gen Intel(R) Core(TM) i9-11950H @ 2.60GHz 2.61 GHz