For library with several sub-circuits, you can call that library from subckt symbol.
A quick way to use a level 0 model from infineon OptiMOS is to take advantage from NMOS symbol. This is an example of a dc sweep for IAUTN06S5N008 level 0 subckt in OptiMOS_5_60V_LTspice.lib
highlight the procedure to convert NMOS symbol into a subckt
dc sweep simulation compares to datasheet
