you can always do Phuket sandbox, there’s no knowing if or when test and go will return, at least on Phuket your only in the hotel room till your 1st PCR test comes back (negative)
Thailand pass was never removed , test and go was , if flying to Bangkok it’s 7 days ASQ with 2 PCR’s, Thailand pass says can take up to 7 days or if everything is correct & QR codes for both vaccines are ok it can be issued immediately , have seen some people been waiting a lot longer than 7 days so best to do it as soon as you have everything booked , flights, ASQ accommodation , travel insurance stating covid cover for at least $50,000 USD . You need all the info from flights & accommodation & travel insurance to fill out the Thaipass
what the Thai embassy in London say & what is actually happening here in Thailand are 2 completely different things ! I’m giving advice on what has happened to others not someone reading things online that aren’t followed here in Thailand
Nope you can’t transit through bkk to Phuket, so would be 7 days (possibly 5 soon) ASQ in Bangkok before you can go anywhere , better to fly direct to Phuket as at least once you get the neg PCR after arrival you can go outside