I believe they require a bank statement from the past month showing the funds. You can download the PDF then upload to the visa portal. No screenshots. Yes, one would need to pay the fee again should the app be declined. Visit the Ottawa or Vancouver Thai Embassy website rather than Chat GPT for accurate information.
You want the extension based on retirement. Read up on the process /requirements for If you have a bank account and the required funds, you likely will find that you won’t need an agent.
you cannot say that it is not true just because you have not been asked. It is a well-known and well-documented requirement. Many people, like you, have never been asked, but we are hearing reports from people in these groups being asked.