Unfortunately, for the applicants all the processes that cost money have to be done first. Fairly easy to do as no involvement with Thai government websites. The real hassle occurs with the Thai Pass application and the Thailandpsas.com (Covid test payment). I do not know how US citizens (and possibly other countries) can make payment on that website. I spent hours screwing around with Thailandpsas.com - try different browsers, try with/without VPN, try on laptop and on mobile phone, try different credit cards - no success. Finally called Thailandpsas.com, actually spoke to someone. Her response is the problem is with the bank that processes the credit - call that bank and complain. Good luck with. Clearly the people at Thailandpsas.com know there is a serious problem with their website.
Now the latest zinger on the Thai Pass website is:
"URGENT ANNOUNCEMENT ! Starting 4 January 2022 Please be advised to avoid making hotel reservations through Booking.com as they do not fully comply with Thailand’s entry regulations and may result in delayed consideration"
How many people have already made hotel reservations on Booking.com and find this little turd buried in the Thai Pass website. Or worse, do not find it and have application delayed because of Booking.com reservation.