Hello dussla,
Currently shapes can be exported only in the following formats: DXF, SHP, KML, KMZ, GeoJSON, GPKG (GeoPackage) and Survey Points (*.txt).
3D mesh model should be exported separately, the supported formats include DXF, 3DS, FBX, OBJ, COLLADA, KMZ and some others.
But it is not possible in the current Metashape version to export 3D mesh model and shapes to the single file.