My experience on Dec. 9 in NYC was that the Singapore Air check-in agent was meticulous in reviewing my paperwork. A supervisor also reviewed it. When I arrived in Phuket, they only wanted to see 4 things — passport, Thailand Pass QR code, payment for arrival RT-PCR test and SHA hotel booking.
None of the resorts will show you much if anything about true Thai culture. I’ve seen some of your other inquiries and have a suggestion for you. Send me a PM if interested.