No tech required to disprove the spinning globe lie yet people still believe the globe

How would I know how many people know the truth and/or have been “beyond” the lands we see on our maps

No idea what is beyond

The only hypothesis is more lands but I would have no way of confirming or denying

For now, we can easily and repeatedly confirm how the earth is definitely neither spinning nor an oblate spheroid

How’d you make out with the earth curve calculator and/or the Coriolis effect problem?