Just sharing some details regarding my successful application:
Location: Canberra Embassy
Applied: June 20th
Stayed on Pending Document Check until July 1st, before changing to Pending Approval
Approved: July 14th
The approval came the day after I emailed the embassy, however this could be coincidental as my intended departure date was less than a week away so it was due to be approved/rejected shortly anyway.
I applied with a 6 month Muay Thai course @ Bangkok Fight Lab.
For proof of activity they provided me with 12 or so documents which i simply compiled.
For proof of location, I showed my Australian drivers license.
For proof of funds I showed a 6 month bank statement showing over 500k baht plus two screenshots of the currency conversions at the first/last day of the bank statement.
I didn’t bother writing any cover letters, or any declarations regarding employment, how I will support myself, etc.
The application was just the bare essentials requested, and no further documents were requested.
Hopefully this helps someone else!!