Government chose not to order them. There are no Bivalent vaccines available in Thailand unfortunately as all purchases of Covid vaccines must go through the government channels.
"The Royal Gazette on Thursday published a Public Health Ministry announcement cancelling the decree dated October 9, 2020 that had allowed the ministry to procure Covid-19 vaccines to protect the public interest, control the outbreak or maintain national security.
The latest announcement, dated October 31, 2022 and signed by Public Health Minister Anutin Charnvirakul, said the Covid-19 situation was improving globally according to World Health Organisation data showing the mortality rate is now the lowest since March 2020.
The government revoked the pandemic emergency decree on October 1, while the ministry also downgraded Covid-19 from a dangerous communicable disease to a communicable disease under surveillance, said the announcement.
Thailand’s stock of Covid-19 vaccine is now sufficient to meet demand and there is no need to procure additional vaccine, it added."
https://www.nationthailand.com/thailand/policies/40021707