Can a Belgian passport holder extend a visa exemption in Thailand, and what are the requirements for COVID-19 before traveling?

A Belgian passport holder arriving in Thailand can enter on a visa exemption for 45 days, which can be extended for an additional 30 days at a local immigration office, as long as the arrival is by March 31st. Post April 1, only a 30-day visa exemption is granted. Currently, proof of vaccinations and possible medical insurance for COVID-19 may be required, especially if traveling to or returning from countries that require a negative PCR test.