I don't consider conflicting reports on Thaivisa or you accusing me of calling some unknown person a liar as reliable information.
I often find the opinions on Google or Facebook wrong. Google is not infallible.
I was told by immigration that the retirement visas are not valid for work. I know of no pne on a retirement visa that was able to work. Mine was an O and stamped as not eligible for work.
If the extension was granted for retirement purposes you cannot work. I had such an extension. I had a retirement visa in 2018-2019. You cannot get a wp with that David Broadfoot.
There is a sign at front of each queue. It can be confusing. Ask people in queue.
If I remember correctly it is the same one as the tourist queue. There is a separate one for marriage visas. You have a different type of Non-O so please double check.