Did the Thailand Pass with my friend who is coming next week. It was approved within 12 hours. We used the above step-by-step as reference and it was very useful. The most tedious page was on vaccination. She had to scan the same QR code three times as she already had three shots. Other than that, the rest was quite okay. There are a lot of photos to take and attach so it is better to do it in the day.
Thank you so much for your advice. Due to the Covid 19, many procedures have changed quite a bit. It was a long story but it is okay. Things will get sorted out. Thanks.