Hi Masse,
It looks like Solibri does not import IFC Annotations. Other IFC Analysis Applications i.e. Navisworks and Tekla BIMSight are capable of importing IFCAnnotation elements however.
Design applications such as Revit will also be able to import IFC Annotations from ArchiCAD aswell.
I had a look within the Solibri Model Checker Settings but I couldn't find a way to add IFC Annotations to the import therefore I suspect it may be a limitation.
Hope this helps.
Kind regards,
Marcus