@Keith ***********
actually I stand corrected. My friend Mr Grok clarified that while Embassy’s generally issue O-A, Non O can in-fact be issued externally. Mind you TIT so we cannot take Groks take on how an IO would/should behave. Partial extract of the Grok output as below.
Non-Immigrant O Visa (Retirement) Inside Thailand
The Non-Immigrant O visa (retirement category) is commonly used by those over 50 who wish to retire in Thailand. It can be initially obtained abroad or, in cases, applied for or extended inside Thailand through a change of visa status or extension of stay at an Immigration Office. This visa is often simpler to extend annually compared to the O-A or O-X visas, as it may require fewer documents for extensions, depending on the local Immigration Office’s discretion.