Hello,
An e57 file is visible in plan under the conditions that you parameter. You have to indicate to your object e57 imported the values under "Override plan display" (or something like that, I've got only a French Archicad)
It is here :
By these parameters you can see what you need to model step by step
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