Need some advice.

Our family (in Phuket) wants to go to a holiday in Europe (two weeks).We are fully vaccinated with yellow vaccination passport.

Is it possible to book a return ticket and apply for a COE in Thailand prior to leaving?

With the new regulations, do we still only need to use Phuket as entry point?

What's the difference between COE and the other thing they implement for 01/11?

My son is 11 years old, can he come into Thailand without vaccination?

TIA!

Hey all wondering if you could help, this is my first post asking so please bare with me, im planning on flying into Bangkok with a non immigrant business visa, I know DMK is not the best for tourist as they can be a bit harsh, and it's best flying into BKK instead, so if i fly into DMK with the non business visa do you think this is ok? Thank you in advance