Da soll sich wohl ein Übersetzungsfehler eingeschlichen haben......na ja, "Der-Farang.com".
Thai relatives/visitors
In the case you have a relative or friend who is already resident in Thailand, they are allowed to visit and stay with you during your fourteen <14> ‘SHA Plus’ hotel night stays.
Your friend or relative is responsible to comply with the current domestic travel requirements when traveling to see you.
Thai relatives or friends wishing to stay in the same room with a traveler arriving from overseas must have their name included in the hotel booking (guest 2) to avoid any problems at check-in
At the time of press (and please be reminded that these regulations can/may change by individual Provincial Governors) the following regulations are required:
Fully vaccinated (two <2> vaccinations) OR one vaccination of the AstraZeneca vaccine
OR
Show a Negative Covid-19 test within the past seven <7> before traveling to Phuket
OR
Show evidence that they have fully recovered from Covid-19 in the previous ninety <90> days.
Quelle:
https://www.phuket-sandbox.com/copy-of-faq-1