So, if you were applying for your first covid extension, and you had 6 weeks left on your current visa, it sounds to me like you haven't even applied for your first 30 day extension of your tourist visa yet.
What date did you enter Thailand? What visa did you have or did you enter visa exempt?
Tis link is a GUIDE only... mentions father not mother. Mentions money in bank 7 days.
Phuket Immigration is dead quiet at the moment so follow Tods advice and go speak to them. They close for lunch 1200 to 1300 (or maybe 1300 to 1400 cant remember)
There's an immigration office on Koh Tao and they aren't that busy. Go see them and see if you can do it there. Worst that can happen is they say is no and you've wasted a full 15 minutes of your day. If you have the patience, technical know how and an android phone, you could try doing it on line. I managed it recently using Brave browser (not the app}