requirement is still to overnight in BKK for 1 night,,theire should be an option to rebook your continuation flight a day or 2 later to Phuket in that airlines home site...normallt airlines will give you an option to rebook if they cancelled the flight in advance.or request a refund, and then rebook another option that works for you.
better yet, stop the nonsense with all these registration requirements, require Vaccination papers ok, the rest, forget it! I don't know of a single country right now participating with thise crap, and if they want millions to arrive like before, then that is the only solution.
we are livving in the electronic world, making it easy for all now to most countries since you don't need to bring your passport to an Embassy. conveninet for all, no long lines to stand in. approval message sent you.