You might find this old thread helpful.
https://forums.sketchup.com/t/exporting-to-step-format-stp
AFAIK there isn’t a way of doing it directly from SU in one process.
You might find this old thread helpful.
https://forums.sketchup.com/t/exporting-to-step-format-stp
AFAIK there isn’t a way of doing it directly from SU in one process.