How is Tuvalu governed as a constitutional monarchy?

Tuvalu is a constitutional monarchy within the Commonwealth, where the British monarch serves as the head of state, represented by a governor-general.1

The country operates as a parliamentary democracy featuring a unicameral legislature, known as Parliament, which is elected by universal adult suffrage. The government functions without political parties, and the prime minister is selected by and from the members of the legislature. Most major government offices, including the cabinet and the High Court, are located in the village of Vaiaku on Funafuti Atoll.123