We just got covid extension approved today from Chaengwattana immigration office!
Happy to report that it went relatively easy. No need to book an appointment despise what the 1178 call center told us. My bf entered with tourist visa last year in September. Then extended twice already in Bangkok.
The documents required are almost the same with the addition of 5-6 page form. And the resident registration you get from the hotel need to b a print out, not just a screenshot.
In an out in 2 hours. 👍