I got my STV extension request approved today (Friday 8 October) and wanted to share my experience with you all.
I was worried for the past few months since the previous announcement said STVs were ending September 30, 2021, and I hoped to stay the full 9 months. The latest announcement said they were extending STV until September 2022, which is great news but I wasn't sure it would apply to me since I arrived on July 28.
Anyway, I went this morning to Chang Wattana, arrived at 8:45 am and was done before 10 am!
I had all my documents ready and printed as per the list I found here ([members only]).
Note: you must bring the receipt of payment for your ASQ hotel stay as well. The ASQ completion certificate will not suffice. There's a print and copy center downstairs if you need to do any last minute printing or even take your passport photo.
There were barely any people there in the morning, and I probably could have finished the whole process in 30-45 mins max, if I didn't have to print additional documents :)