Any branch can get it but if it's 12 months statements You need then they have to put request into the main branch in Bangkok and You have to wait 10 days or they send them to your local Bangkok Bank branch ,I did this in April in Phuket for my retirement visa 12 month extension
for COVID extension only the main immigration office in phuket town issue them as my neighbour tried at immigration office in Blue Tree resort and was told only main office in Phuket town issues Them