Can I get a 7-day COVID extension at immigration in Chiang Mai before my flight?

The user is seeking information regarding the possibility of obtaining a 7-day COVID extension at immigration in Chiang Mai as their 45-day extension is expiring soon. They inquire if this extension is currently being granted and if they can apply for it earlier than the expiration date. Responses indicate that the 7-day extension is not truly an extension but a short grace period following an application rejection. Additionally, there are restrictions on obtaining another COVID extension based on prior visa types.