How can I extend my 60-day visa in Thailand while considering new rules?

The user arrived in Thailand on a 60-day visa and plans to renew it in early February while in Phuket. They are seeking advice on potential new rules affecting their visa extension, given their vaccination status and possession of health insurance. Responses indicate that new COVID-19 rules are unlikely to affect extensions and that the process for extending a visa can be easily completed at any Thai immigration office, such as the one in Blue Tree.