My friend also applied in 2022, timeline here-
Application submitted to SB - Early March 2022
NIA interview - Early Sep 2022
Application sent to MOI - 31 Oct 2022
Will inform you , if he is called up
No, Anutin has approved female candidates pretty recently, which was published in the RG.
So, in short, the wheels are moving.
I have no idea about Chiang Mai and how they operate.
Have you finished the oath?
The person who checks and approves the files is my good friend in MOI.
He told me that they are now finalzing 2021 files
Recently they are giving only a days' notice to attend the interview, so you will have to be on standby mode.
If you have a valid Thai National ID card and a valid Thai passport, you are a Thai citizen.
That is immaterial that you entered on a foreign passport.
The rule was recently changed by the Ministry of interior, that Thai citizens entering Thailand on a foreign passport will not be charged overstay fee /deportation or any punishment.
You don't have to exit Thailand or apply visa of any kind bcoz you're Thai.
Simply show your Thai passport, foreign passport and Thai National ID card upon exit