never trust AI summaries of even thw simplest topic. It makes things up. Something like thai immigration is the worst possible thing to use AI to find out about.
If she does not have a proper job, business or property to return to in Thailand this seems to be an issue for approvals. They are paranoid about illegal workers etc.
Wow, that's rough, can't really advise directly as an Aussie but had no problems at all with same situation for us. Good luck sorting it out, surely it shouldn't be that hard for a married couple!
For some reason this process is very unpredictable and each bank makes up ita own rules. Some places make it really complicated..Just go somewhere else however and it can be very easy. I can't make it make sense but that is the reality.