Hello KaeTi,
IFC is more than a 3D model.
There are so much parameters to translate before to import an IFC.
It's difficult to help you without knowing what you do before.
I invite you to :
- check your ifc import translator
- make visible all your layer in 3D view
- in 3D right clic and "show all in 3D"
Finaly clic on the little button like this one :
Christophe - FRANCEArchicad Designer and Teacher
Archicad 15 to 27 FRA FULL
OS 11.6 Big Sur - MacBook Pro 2017 - 16Go RAM
"Quality is never an accident ; it's always the result of an intelligent effort" John Ruskin