Can I apply for a yearly extension on my Non-O-A visa after almost two years, and is the bank requirement still 400K for 2 months?

The user secured a Non-O-A visa from their home country and is asking whether they can apply for a yearly extension 30 days prior to the visa's end date after nearly two years. They are also inquiring if the requirement still stands at having 400,000 THB in their bank account for 2 months.