in my experience, it was a thailand immigration officer who demanded to see my onward ticket. It was only a pdf file on my phone and she didn't even confirm it. I don't know about you but i think it is abnormal to check for but not confirm something that can easily be only valid for 48 hours or maybe even faked. ...and i don't think anything unproductive and unnecessary should be considered normal. but hey...i just speak for myself.
Sounds like a waste of time and money when we can easily get an onward ticket valid for 48 hours for about $10. I don't see what the point of doing this is.
So, I can technically apply for an extension of stay on March 5th then again the covid extension on March 25 and, if approved, be allowed to stay until May 25?