Can I get an additional 30 days extension for a visa exempt from the UK, and do I need to book an appointment at the Bangkok extension office?

Inquiring about visa extension options for a UK citizen with a visa exemption, specifically regarding the possibility of obtaining an additional 30 days or a longer COVID extension, and whether an appointment is necessary for the extension office in Bangkok. Notably, there may be a requirement to first secure the regular 30-day extension before qualifying for the COVID extension, with varied procedures depending on the specific location.