What should I write as the reason for a 60-day extension during COVID-19 on the TM7 form in Thailand?

Sorry for the basic question.

Applying for 60 day extension - unable to travel during Covid tomorrow. When filling out the TM7 form, what is it suggested to write under "reason (s) for extension"?

Do we need to indicate that we are completely unable to leave the country, or should we write: don't wish to travel during a pandemic, feel safer staying here until cases drop etc?

I'm assuming above this under "I wish to apply for an extension of stay in the kingdom for another period of ........... days" we just fill in 60 and they know it's the covid extension I'm applying for? There's no where to indicate that's what I'm asking for (though it would be my only option, anyway).