What Are the Entry Requirements for Travelers from the USA to Thailand Regarding Health Documentation?

Mods please remove if this has been answered.

I have 2 friends entering from USA on the 26th, they have medical insurance, or can purchase 30 days international travel ins. if necessary.

This photo was posted recently as a required doc for entry, the poster was entering from cambodia and was told that they need a doctor's note stating no evidence of fever, cough, or chest pain, but nothing about an official negative covid test.

If anyone hears from anyone entering from the US could you please post here with the story?

Thanks, and huge thanks to the mods for the hard work.