Got my fresh 30 day TR visa stamp at Chaeng Wattana today (8/5/21). Process was super quick. Showed up at 14:30 and got out at 14:50. I was que number 100.
Forms that I filled out there, asked the information booth there if you don't have them prior.
1. TM7
1. STM.2
Stuff I had on hand.
1. 1900 Baht
1. Passport
1. Copy of Passport Photo Page
1. Copy of TM6 w/ stamp of arrival
1. 2x2 photo
1. Pen
TLDR : Answer Summary
The user successfully obtained a 30-day Tourist Visa (TR visa) stamp at Chaeng Wattana, noting the process took only 20 minutes. They filled out forms TM7 and STM.2 on-site, and had the necessary documents ready, including 1900 Baht, passport, copies of the passport photo page and TM6 with arrival stamp, a 2x2 photo, and a pen.